Palo alto lacp fast failover Do I need to setup link and path monitoring on both the active and and passive firewall or just the active? I have Jul 22, 2025 · However, if you enable Link Aggregation Control Protocol (LACP), failure detection is automatic at the physical and data link layers regardless of whether the peers are directly connected. We get LACP timeouts on one of the Switches, presumably because it's failing to receive PDUs in-time (and that's presumably because of the tail-dropping) Pros/Cons to setting these timers to Slow as an alternate route to alleviating this? Jul 13, 2023 · Hello, I am trying to set up a LACP between a palo alto 3220 ztp firewall and a DELL switch, I have the following problem, it does not set up the LACP. This chapter contains the following sections: Port Channel Introduction Port Channel Conceptual Nov 14, 2018 · Those interfaces are plugged to a switch with LACP configuration and this switch is plugged to the Intrernet Router. 2 Setup the LACP bond on both ends, LACP would not negotiate. The active device continuously synchronizes its configuration and session information with the passive device over two dedicated Port Channels and LACP This chapter describes channel groups, port channels, port channel interfaces, and the Link Aggregation Control Protocol (LACP). The objective is to monitor my internet access and trigger a failover (Make my seond (PAssive) firewall in active mode. BFD failure detection is extremely fast, providing for a faster failover than can be achieved by link monitoring or frequent dynamic routing health checks, such as Hello packets or heartbeats. 7. 10 in active/passive. Create an Aggregate Interface 2. Both firewalls simultaneously believed they were active, causing a complete traffic halt and requiring a manual reboot of In addition to the failover triggers listed above, a failover also occurs when the administrator suspends the firewall or when preemption occurs. On PA-3200 Series, PA-5200 Series, and PA-7000 Series firewalls, a failover can occur when an internal health check fails. I ended up putting them in a load balancer sandwich without the API and now the failover sequence is seconds. It will Aug 30, 2022 · Objective Troubleshooting LACP going down or flap issue Environment Palo Alto Firewall LACP Configured Procedure Check the system logs with filter set to (subtype eq lacp) under UI: Monitor > Logs > System show log system direction equal backward subtype equal lacp Check the l2ctrld. I bundled the aggregate links, assigned the vlan interface to the Palo Alto and setup the port-channel on the Nexus 9Ks. Thus, a firewall in Passive or Non-functional HA state can communicate with neighboring devices using LACP or LLDP. Configuring HA failover monitors differs based on the upstream devices, in some cases interface failure is enough but to be completely sure that you have all bases covered path monitor can also be Base your selection on how much LACP processing your network supports and how quickly LACP peers must detect and resolve interface failures. As far as spanning tree goes, we do NOT have enable stpd s0 autobind vlan <vlan name> on vlan MLAG-ISC (4094) Aug 3, 2017 · Hi All After some help from the Guru's. 25 has been May 14, 2025 · Yesterday our HA infrastructure on a pair of Palo Alto PA‑3420 (Active‑Passive) firewalls completely froze. 2 (4)E4, however during testing I still see it taking 10-15 seconds for the bundle to form. Aug 30, 2022 · Objective Troubleshooting LACP going down or flap issue Environment Palo Alto Firewall LACP Configured Procedure Check the system logs with filter set to (subtype eq lacp) under UI: Monitor > Logs > System show log system direction equal backward subtype equal lacp Check the l2ctrld. Lacp had failed from core cisco 9500 switch to palo 1420 to primary firewall. This was run Feb 17, 2025 · We recently encountered the same issue even after replacing the device through an RMA. Fast forward to today and I just did an update to the palo alto and during fail over the interfaces on the secondary palo alto were having issues coming up. Things seem to work fine for the most part. I went ahead and reconfigured my PA-450s for an active/passive issue. Because the However, if you enable Link Aggregation Control Protocol (LACP), failure detection is automatic at the physical and data link layers regardless of whether the peers are directly connected. I've seen it recommended for some other vendors as well, but it seems counter-intuitive to me. A year ago I prepared similar environment and in best moment I got 1 ping off, but average 3 pings are missed. I'm wondering what steps to take as regards packet captures on firewall interfaces to figur Try with BFD and if you use LACP, in Palo is an option to bring interfaces on passive device up before failover occure. Cause When an aggregate interface is enabled with LACP, LACP PDU (protocol data unit) messages are exchanged with the peer device to dynamically negotiate LACP parameters and establish or maintain the AE interface status. As a result, we escalated the support case to a Critical priority, prompting involvement from Palo Alto Engineering, as the problem began impacting production during peak hours. Sep 25, 2018 · Controlling failover for an aggregate interface can be achieved through a monitoring profile on the HA (High Availability) configuration. Aug 5, 2025 · I'm having an issue with a single interface in an aggregate bundle failing LACP negotiations after updating one network's firewalls from PAN-OS 10. If you post the interface configurations here we can likely tell you if something is misconfigured. Link Aggregation Control Protocol is a useful feature for creating dynamic port groupings or Aggregate Groups. Currently we have a pair of PA-3060 running 6. I also wanted to point out that it's time to start thinking about a software update on this firewall. The specific example in this article is for PA-5000 Nov 17, 2025 · This video describes how to configure fast LACP Timer in Cisco ACI fabric running 5. Set the Passive Link State to Auto. Spent many hours wtf’ing, couldn’t find anything odd anywhere, other LACP bonds we’ve setup previously work Sep 25, 2018 · Symptom When deploying a Palo Alto Networks (PAN) HA pair in L3 there are some considerations that should be taken into account to achieve the most optimal failover time. 2. log If ethernet interface moved If a firewall uses LACP or LLDP, negotiation of those protocols upon failover prevents sub-second failover. The ha firewall never failed over and I had to reboot the firewall get all layer 3 connectivity back up. Unfortunately HA logs don't stretch back enough! Looking at the l2ctrid. Device is in HA "suspended" state. Aug 21, 2025 · Hi, I have a customer who's firewall unexpectantly failed over recently, looking at the logs before failover LACP links appeared to fail negotiation right before which triggers failover. Tags:ACI,LACP Jan 29, 2025 · This example gNMI request sets LACP mode to active for aggregate ethernet interface 1. Cases are opened with both Palo Alto and Cisco. Are the Switchports on your passive Firewall down? There is a setting for this under the interface LACP settings to help with a quicker failover, I forgot the description of that but if the setting is not enabled the firewall needs to negotiate with the switch first LACP before it can take the clienttraffic. Without knowing more about your network and configuration, it's hard to say why the failover would make the passive node unaccessible and cause all of your traffic to stop. However, if you enable Link Aggregation Control Protocol (LACP), failure detection is automatic at the physical and data link layers regardless of whether the peers are directly connected. logs (LACP log files on TSF) See th Nov 8, 2024 · LLDP is enabled, and on the palo side under LACP its enabled in passive mode, fast transmission rate, the fast failover is checked and Enable in HA Passive state is checked. An AE interface group increases the bandwidth between peers by load balancing traffic across the combined interfaces. This would allow me to perform maintenance on either of the core switches without causing an HA failover. Make sure at least one side is in active mode. I have created the AE group interface Inside with the ip address. The CORE switches run all layer 3 Link Aggregation Control Protocol (LACP) provides a standard means for information exchange between the systems on a link. Overriding the default behavior facilitates subsecond failover. Each 2 connections are connected to a PA as an AE. Jul 29, 2019 · I am leaning more towards LACP settings at this moment. Select Fast Failover if you want to enable failover to a standby interface in less than one second. LACP based aggregate interface status is "down" Environment Palo Alto Firewalls Supported PAN-OS High Availability Active/Passive LACP pre-negotiation enabled. The LACP timers are set to Fast (1 sec), on both ends. Enable LACP. Apr 28, 2021 · Transmission Rate: chọn Fast (Đây là tốc độ truyền của truy vấn LACP, nếu chọn Slow thì mặc định 30 giây, còn chọn Fast thì nó sẽ truy vấn mỗi giây. I will have an LACP port-channel connecting one port of each Cisco switch (ports g1/0/1 and g2/0/1 Palo Alto say up to 3, but in testing I found it to be closer to 10. If you need absolutly transparent/least impact then switch back to non-LACP aggregation. Mar 19, 2015 · BUT, I tested the HA failover and the secondary PA failed to establish the LACP connection with the Juniper SRX and faulted the link. Although the interface displays green (as cabled and up) it continues to discard all traffic until a failover is triggered. Oct 11, 2021 · This allows the passive interfaces to participate in LACP communication, but still drops the rest of the traffic on the passive node. 1 and above LACP Procedure 1. I'm trying to setup a layer 2 port channel between my Nexus 9Ks and the Palo Firewall for vlan 200 traffic only. 0. Starting with Junos OS release 12. It also provides redundancy; when one interface fails Feb 11, 2020 · @myky, The fact that one of your ports are simply failing negotiation points to a switch configuration issue, so I would have that verified to actually be configured correctly. This article explains the behaviour of port flaps observed. less mp-log l2ctrld. x 次パロ ・ アルト ネットワーク ファイアウォールが LACP をサポートする上、& Sep 25, 2018 · Environment Palo Alto Networks Firewall. May 15, 2025 · We’re experiencing a critical issue with our HA setup on a pair of Palo Alto PA‑3420 firewalls running PAN‑OS 11. 6‑h3 in Active‑Passive mode (HA Group 25, preemptive disabled). Running PanOS 6. It is configured with an agregated interface with LACP enabled (mode active, transmission rate Fast). I will have two PA-440s in Active/Passive High Availability mode. Jul 29, 2019 · During the last PAN OS upgrade we had to failover between two firewalls in HA configuration. Step 3. Each entry includes the date and time, event severity, and event description. 0 Failover from one HA peer to another occurs for a number of reasons; you can use link or path monitoring to trigger a failover. Cisco stack). The failover time takes unusually amount of time during which the Internet access was unavailable. Why isn't it always better to have faster detection of a failed member of the LAG? If a link fails it would take the switch 90s to stop sending traffic down that link, which means 90s of To test that your HA configuration works properly, trigger a manual failover and verify that the firewalls transition states successfully. On the active firewall the LACP negotiates properly but on the passive firewal. Following are the configuration steps for both devices as well as some show commands. Jul 18, 2021 · This being said we are now doing full LACP L3 (regular port channels) with the Palo Alto doing core routing and have no issues (PAN OS 10. I have created a portchannel on the Cisco switch and put Sep 3, 2024 · Hello, everyone. The LACP aggregate interface on the Cisco switch / Firewall did not come up during this time, which resulted in a longer than expected outage. Fail over works fine. However, it takes 40 seconds to do so even with LACP "Enable in HA Passive State". Resolution RFC に従って: デバイスの伝送速度が異なる場合は、それぞれのピアのレートが使用されます。 パッシブモードのポートは、パートナーがアクティブモードでない限り、通常は LACP メッセージを送信しません。ということは、話しかけられない限り話すことはありません。としては The NGFW cluster solution reduces failover time (compared to legacy HA), increases resiliency, and supports a multichassis link aggregation group (MC-LAG). The below topics discuss the overview of LACP on standalone devices, examples of configuring LACP, LAG and LACP support line devices. CORE1 and CORE2 are Cisco Nexus switches that are running HSRP. Another thing would be the LACP Fast transmission rate that might force the Cisco In the Aruba VSX best practices for 8360 (among others) they recommend LACP rate slow for downstream MCLAG links. Both devices have LACP bundles towards a Cisco router. Cause As described in " LACP and LLDP Pre-Negotiation for Active/Passive HA ", LACP pre-negotiation will pre-negotiate Nov 16, 2023 · Please make sure if the required mode i. Yet dont look for instant/no loss failover with LACP on PANOS, this may come in next release. Jul 17, 2017 · Today's task was get LACP working on a Palo Alto, so traffic and fault tolerance could be spread across multiple members of a Cisco 3750X switch stack. x. The active device continuously synchronizes its configuration and session information with the passive device over two dedicated Nov 8, 2024 · LLDP is enabled, and on the palo side under LACP its enabled in passive mode, fast transmission rate, the fast failover is checked and Enable in HA Passive state is checked. The most recent incident occurred o Mar 26, 2019 · Symptom When there is a HA failover from Active to Passive firewall, we see that some ports on previous active firewall go down and then come up. Because the Link Aggregation Control Protocol is a useful feature for creating dynamic port groupings or Aggregate Groups. Jul 22, 2025 · However, you can enable an interface on a passive firewall to negotiate LACP and LLDP prior to failover. 3ad standard and facilitate subsecond failover, include the fast-failover statement at the [edit interfaces interface-name aggregated-ether-options May 30, 2023 · Another thing would be the LACP Fast transmission rate that might force the Cisco side to suspend the port-channel faster (1s compared with 30s). This feature introduces a new option to allow the passive firewall to communicate with its neighboring device using specific L2 network protocols such as LACP and LLDP. In DeviceHigh AvailabilityGeneral, edit the Active Passive Settings. These interfaces are attacheced to a procurve 5406 where the interfaces on the procurve are configured as a trunk of the type lacp. How can I attach a HA pair of PA's to a single device if LACP isn't going to work? Nov 29, 2019 · Symptom The Firewall is configured for Link Aggregation using LACP as the bundling protocol Please see HOW TO CONFIGURE LACP for assistance in configuring LACP. From my point of view, it depends on how you've decided that one ICMP timeout happened during the failover. 10-h5 connected to a 9200 Cisco stack with a LACP configured between them. So we basically have one port in the EC (Etherchannel) forwarding data while the other one is in hot standby Feb 17, 2025 · We had the same issue this morning. 3ad standard and to allow the standby link always to receive traffic. Dec 25, 2012 · ‎ 07-19-2017 04:02 PM The lacp rate fast command is definitely supported in 15. I am strong believer that this community is a great place to get answer, sharing ideas, best practice, tips and trick and that everyone's time is valuable, including mine. In general, link aggregation looks to combine (aggregate) multiple network connections in parallel to increase throughput and provide redundancy. 2, you can also configure LACP to override the IEEE 802. Oct 27, 2022 · First I wanted to say thank you to all who helped me with my PA active/active issue. I have some questions regarding LACP F-Switchover. This lesson explains how to troubleshoot Eterchannels (Link Aggregation) on Cisco IOS Switches. 4) with HA failovers. It took approximately 10-15 lost pings (to internet host) for passive to become an active. The most recent incident occurred o MS Series MX Series Configuring Link Aggregation between MS and Cisco Switches Link Aggregation is a nebulous term used to describe various implementations and underlying technologies. Another pair of 5060 firewalls were connected to the same switch, with the same configuration, failover/failback is 1-2 seconds max. e Active/Passive and transmission rate slow/fast is set Note : If both the peers are in "Passive State", LACP connection will not be established May 15, 2025 · We’re experiencing a critical issue with our HA setup on a pair of Palo Alto PA‑3420 firewalls running PAN‑OS 11. By default, the option is disabled and the firewall uses the IEEE 802. You can change the timeout rate from the default rate (30 seconds) to the fast rate (1 second). HA state of the device is "suspended". We had to manually reboot the actual active node to restore service. 2019/09/27 16:10:17 critical lacp ethern lacp-up 0 LACP interface ethernet1/7 moved into AE-group ae1. Feb 18, 2021 · We recently had a failover event during a normal upgrade of the firewall (10. For a partial list of System log messages and their corresponding severity levels, refer to System Log Events. Oct 21, 2022 · Are you aware that the firewall supports Bidirectional Forwarding Detection (BFD)? BFD failure detection is very fast and as a result, allows for faster failover than native dynamic routing protocol failure mechanisms. As seen from below High availability (HA) timers facilitate a firewall to detect a firewall failure and trigger a failover. Active/Passive High Availability (HA) provides firewall redundancy by maintaining two firewalls in a primary-secondary relationship, where one firewall actively processes traffic while the other remains in standby mode, ready to assume control if the primary firewall fails. The total failover time depends on several additional factors as well as the HA timer tuning tips mentioned in this document. May 30, 2023 · I would also enable Fast Failover like @BPry suggested and add check the Enable in HA Passive Sta te (in case you have HA) due to the fact that the standby unit will be down unless it's checked and, in case you Cisco switch does not have spanning-tree portfast trunk enabled it will go through all the STP states. Sep 26, 2018 · Die LACP-vorverhandlungs Funktion hilft, indem Sie LACP-Nachrichten auf den passiven FW-Port-Kanal sendet und die AE-Verbindung vorher nach oben bringt, um bei fast Failover zu helfen. 1. Jun 21, 2022 · Hello Team, Where I can find information about how traffic balance between physical interfaces in case when LACP used? Can I choose balancing method in configuration (source/destination, MAC/IP Addr, L4 Ports)? I found information about traffic distribution mechanism in LAG for early versions of Nov 5, 2025 · By default, interface failure detection is automatic only at the physical layer between directly connected peers. Aug 10, 2023 · I am planning a new site and want to make sure my detailed design will not be a problem. On preferred code version 11. The auto option decreases the amount of time it takes for the passive firewall to take over when a failover occurs. LACP (Link Aggregation Control Protocol) configured. PAN-OS 8. To override the IEEE 802. Can anyone guide me on this ? For some background, we are weighing the Pros and Cons for:- option 1) to create one single lacp (eg 4 Mar 11, 2010 · Hello, Can I configure the command lacp fast-switchover without configuring LACP 1:1 Redundancy? How it works? Does the traffic is balanced between the two links of the EtherChannel? What is the difference between commands lacp fast-switchover and lacp rate fast ? Thank you. I'd like to connect Eth1/2 to CORE1 and Eth1/4 to CORE2. Aggregate Groups increase traffic throughput and provide link redundancy. Assign physical interface to Aggregate Nov 9, 2015 · Overview When deploying Palo Alto Networks firewalls in an HA cluster, there are some considerations that should be taken into account to achieve the most optimal failover times. In an Active/Passive HA deployment, the active firewall handles all network traffic and maintains the runtime state Failback between firewalls is inconsistent, and often results in the AE interface being 'Up' on the passive firewall and down on the active firewall (causing an outage). I have a customer who's firewall unexpectantly failed over recently, looking at the logs before failover LACP links appeared to fail negotiation right before which triggers failover. 13 to 11. g. Another thing would be the LACP Fast transmission rate that might force the Cisco Oct 7, 2016 · Yet dont look for instant/no loss failover with LACP on PANOS, this may come in next release. Feb 19, 2014 · Description This article describes changes caused by the fast-failover knob in the behavior of the Link Aggregation Control Protocol (LACP) in link-protect in Junos 12. Feb 10, 2014 · ‎ 02-10-2014 01:56 PM Does that cause a failover, or just suspend the HA configuration? This is what I am a little concerned about - I don't want both devices going active. 4). We suspect the root cause is related to LACP on our aggregated The firewall supports Bidirectional Forwarding Detection (BFD), (RFC 5880), a protocol that recognizes a failure in the bidirectional path between two routing peers. Resolution RFC に従って: デバイスの伝送速度が異なる場合は、それぞれのピアのレートが使用されます。 パッシブモードのポートは、パートナーがアクティブモードでない限り、通常は LACP メッセージを送信しません。ということは、話しかけられない限り話すことはありません。としては System logs display entries for each system event on the firewall. This allows for greater overall bandwidth over a single interface on a per flow basis based on your port channel algorithm. If LACP timeout is a slow timeout, the time taken is 90 seconds ( 3x30 seconds). Sep 25, 2018 · This document specify how to aggregate multiple interfaces on Palo Alto Networks Firewall to acts a single logical interface. Fast Failover: tích chọn (Chọn Fast Failover nếu bạn muốn bật chuyển đổi dự phòng sang cổng standby trong vòng chưa đầy một giây. Symptoms When the active leg (collecting and distributing) is deactivated/disabled, the aggregated ether (AE) interface will flap even if there is a second leg in an “attached” state that takes over. These settings may or may not apply to Virtual Wire, but In the L3 configuration you need to make sure you have LACP configured and in Fast Failover. Mar 2, 2023 · ‎ 03-15-2023 03:11 AM Hello, for some reason the aggregation link on the switch which it's connected to, didn't work in dynamic link. Get started with PAN-OS 7. 1AX link aggregation to combine multiple Ethernet interfaces in to a single virtual interface that connects the firewall to another network device or another firewall. Waiting for an update and wondering if this same potential bug can effect our 5260 I have a PA440 in a HA config (active/passive) on FW 10. As far as spanning tree goes, we do NOT have enable stpd s0 autobind vlan <vlan name> on vlan MLAG-ISC (4094) May 30, 2023 · I would also enable Fast Failover like @BPry suggested and add check the Enable in HA Passive Sta te (in case you have HA) due to the fact that the standby unit will be down unless it's checked and, in case you Cisco switch does not have spanning-tree portfast trunk enabled it will go through all the STP states. Jan 25, 2016 · Use the lacp rate command to set the rate at which LACP control packets are sent to an LACP-supported interface. The default settings on the Palo Alto surprised me a bit, as I was expecting it to default to active and enable fast timers, but this was easy… Aug 5, 2025 · I'm having an issue with a single interface in an aggregate bundle failing LACP negotiations after updating one network's firewalls from PAN-OS 10. Another thing would be the LACP Fast transmission rate that might force the Cisco Mar 8, 2019 · We've a PA-3050 up and running for over a year now. Feb 12, 2024 · Symptom LACP pre-negotiation is enabled. Oct 5, 2023 · This document describes how to troubleshoot Link Aggregation Control Protocol (LACP) on Nexus 9000 cloudscale family. But one thing I am working on now is setting up link and path monitoring. Also, how do you re-enable it? Just do the same on the other device? May 30, 2023 · I would also enable Fast Failover like @BPry suggested and add check the Enable in HA Passive Sta te (in case you have HA) due to the fact that the standby unit will be down unless it's checked and, in case you Cisco switch does not have spanning-tree portfast trunk enabled it will go through all the STP states. I am trying to configure LACP between PA 3020 Active / Passive and cisco switch. This is with a Palo Alto firewall LACP with Palo Alto Firewalls Resource List: Performance and Stability« Go Back I have a customer who's firewall unexpectantly failed over recently, looking at the logs before failover LACP links appeared to fail negotiation right before which triggers failover. 1ax standard for failover processing, which takes at least three seconds. PAN-OS 10. Feb 28, 2024 · If LACP timeout is a fast timeout, the time taken when 3 consecutive PDUs are missed is 3 seconds (3x1 second). 5 addressed issues. Mar 22, 2019 · ‎ 03-24-2019 01:07 PM @AbdulRahman_Safwat, Currently as you have it confiugured a failover would cause the switch and the firewall to go through the entire LACP negotiation process; as this process takes a small amount of time, traffic would be disrupted until LACP can actually form and the interfaces start passing traffic. I configured LACP for two ports connected from a Palo Alto firewall to a Cisco switch. log during the timestamp of the issue gathered from step 1. The Palo Alto Firewall Series supports an active/passive configuration of two devices. Powered down firewall to restore original firewall connection. This Knowledge Article will show us how to resolve an improperly configured Link Aggregation configuration case where misconfiguration on local or peer device shows the AE interface to be not in the correct state. Although you should have different port channels/aggregates to each firewall and enable LACP in passive state to reduce failover time. So we basically have one port in the EC (Etherchannel) forwarding data while the other one is in hot standby Sep 3, 2024 · Hello, everyone. When I reboot the switch on which my palo alto is plugged to test the failover, I lost around 30pings. As shown in the diagram, I set up a LACP Port Channel to bundle 4 connections. Hi, I would just like to verify the normal behavior of LACP in an Active/Passive HA setting. My question is: should each firewall and connection to mx104 be utilizing a separate aggregated Ethernet interface? This guide takes you through the configuration and maintenance of your Palo Alto Networks next-generation firewall. Sep 19, 2024 · Using LACP on a PA, or any device for that matter allows you to bundle multiple physical ports together into a single logical interface. 1 -> 10. I have added 2 interfaces to the AE Group on each FW. admin@PA-3220-ZTP> show lacp aggregate-ethernet all This guide covers configuring and managing Palo Alto Networks next-generation firewall, including: setting up the management network, configuring security policies, and deploying high availability. I have two separate networks (Network A and Network B) each with two PA firewalls in Active/Passive HA. Sep 25, 2018 · Symptom What is the expected behaviour for LACP transmission rate when our firewall is set to passive or active? Sep 30, 2015 · By playing with switch side LACP and Spanning-Tree timers, you can probably achieve 1-4 seconds failover. this makes me wonder, can the palo alto use lacp to a switch wihthout having to configure dynamic lacp on the switch itself? 概要 このドキュメントに複数のインタ フェースを集約する方法を指定する PA に単一の論理インタ フェースの機能します。 詳細 パン OS バージョン 6. Environment Palo Alto Networks Firewall. These will connect to a stack of Cisco C9300s. 6. The actual firewall failover between Palos is seconds, it is Azure that causes the delay. However, if you enable the Link Aggregation Control Protocol, failure detection is automatic at the physical and data link layers even if the peers are directly connected. PA 500 setting up a 4 port LACP bond to juniper switches. Another thing would be the LACP Fast transmission rate that might force the Cisco MS Series MX Series Configuring Link Aggregation between MS and Cisco Switches Link Aggregation is a nebulous term used to describe various implementations and underlying technologies. The graphic illustrates a physical topology compared to a virtual topology. An Aggregate Ethernet (AE) interface group uses IEEE 802. If the failover condition is set to "all" (default is "any"), then a failover triggers only when all monitored interfaces are down. Mar 11, 2015 · Got an odd issue I was hoping someone may have seen. We had opened a c Failover Failover from one HA peer to another occurs for a number of reasons; you can use link or path monitoring to trigger a failover. I have these firewalls cross con Sep 25, 2018 · Customers with mission critical DCs require the ability to failover extremely quickly (sub 1 second) and have visibility of the passive firewall in A/P HA configurations when protocols such as LACP and LLDP are used. Environment The logic mentioned in this article applies to all platforms, but based on hardware implementation, symptoms may differ. 4h7. There are 2 stacked Cisco switches for the LAN. Such pre-negotiation speeds up failover. Jul 22, 2025 · Learn how to configure an active/passive HA pair of firewalls, including setting up physical connections, enabling ping, setting HA mode and group ID, establishing control and data link connections, and enabling HA. Sep 26, 2018 · The LACP pre-negotiation feature helps by sending LACP messages out on the passive FW port-channel and bring the AE link up beforehand to help in fast failover. I have a case open with tac and they are researching tsf. PA FW 1 (the active one) has port 5 and 6 connected to Gi1/0/5 and Gi2/0/5 on the Cisco side. When a failure occurs on one firewall and the peer in the HA pair (or a peer in the HA cluster) takes over the task of securing traffic, the event is called a failover. Sep 30, 2015 · Yet dont look for instant/no loss failover with LACP on PANOS, this may come in next release. Here is my topology: From my understanding, LACP Fast-Switchover can be used in situations where we have a 1:1 redundancy. All Palo Alto Networks ® firewalls support aggregate groups. Mission-critical data centers and Sep 25, 2018 · Symptom When deploying a Palo Alto Networks (PAN) HA pair in L3 there are some considerations that should be taken into account to achieve the most optimal failover time. The time to detect failures in existing routing protocols is no better than o May 31, 2023 · Hello Everyone, Im trying to find a Palo KB that talks about recommended/best practise when setting up Palo HA with LACP to a stack switch (e. LACP also enables automatic failover to standby interfaces if you configured hot spares. However, you can enable an interface on a passive firewall to negotiate LACP and LLDP prior to failover. log If ethernet interface moved Oct 29, 2020 · Hi Live, I'm experiencing an issue with a setup of aggregated ethernet interfaces configured with LACP simply for redundancy connections between our HA Active/Passive firewalls and Cisco ISR 4451 routers. I have these firewalls cross con In Part 2 of the Palo Alto High Availability series, we move inside the fabric—connecting our Active-Passive HA pair to internal Nexus switches using LACP, configuring port monitoring, and Sep 23, 2019 · When we do this on switch it will generate one system ID which would be virtual and will use it for lacp negotiation ( it will not use physical system ID since it will be two in numbers and each would be specific to each switch. I can’t think of anything else right now. e Active/Passive and transmission rate slow/fast is set Note : If both the peers are in "Passive State", LACP connection will not be established Feb 12, 2024 · Symptom LACP pre-negotiation is enabled. This was run Does Anyone know of a way to create redundant links from Palo Alto to Cisco switches? I have two Palo Alto's that are in HA mode. To reduce the complexity in configuring timers for an HA pair, you can select from three profiles: Recommended, Aggressive and Advanced. Sep 30, 2015 · By playing with switch side LACP and Spanning-Tree timers, you can probably achieve 1-4 seconds failover. Objective LACPがダウンまたはフラップの問題のトラブルシューティング Environment パロアルトファイアウォール LACP 設定済み Procedure [UI: Monitor > Logs > System] でフィルタを (subtype eq lacp) に設定して、システム ログを確認します。 show log system direction equal backward subtype equal lacp 手順 1 で収集した問題の Nov 20, 2024 · An Aggregate Ethernet (AE) interface group uses IEEE 802. Mar 8, 2019 · We've a PA-3050 up and running for over a year now. These profiles auto-populate the optimum HA timer values for the specific firewall platform to enable a speedier HA deployment. 2 and above. Both units continued to believe they were the active peer, and automatic failover never occurred. The following table summarizes the System log severity levels.