load balancers convergence (Radware)
mihaigabriel at gmail.com
Thu Dec 8 22:20:35 UTC 2016
Sorry if this is not the right list to post but it's the last resort
and any clue would be highly appreciated.
I am new to LBs world and have the following active-standby topology
- BGP local-pref is higher on the R1-A1 session.
- VRRP priority is higher on Alteon1.
- both Lbs advertise the same VIP address in BGP.
- NAT is configured for WEB servers IPs.
I am using these devices to load balance HTTP traffic and have the
1. Alteon1 fails and the traffic moves to Alteon2 without problems.
2. After Alteon1 recovers, it becomes the VRRP master due to higher
priority, but the BGP session between Alteon1 and Router1 establishes
after VRRP preemption (more than 1 minute after A1 becomes master) and
the traffic gets dropped. I tried to use the hold-off timer to delay the
VRRP preemption to match the BGP session establishment but still have
Creating a direct link and BGP session between Alteons does not help as
the traffic will be asymmetrical and is dropped on Alteon1.
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