Active Active VIP ping inconsistent

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Active Active VIP ping inconsistent

L0 Member

Hello All,

i have 2 Firewalls configured in HA Active Active.

I have a L3 sub interface created on each firewall and a vitual address configured as IP-Modulo arp-load-sharing.

 

ex:

FW1 (primary): 192.168.0.2/24

FW2 (secondary): 192.168.0.3/24

Virtual IP (ip modulo): 192.168.0.1/24

zone: trust

 

a management profile is configured on both FW1 and FW2 to allow ping on the interfaces.

 

clients on the LAN (192.168.0.10/24) can ping all 3 IP addresses.

clients on another zone of the firewall can ping FW2 192.168.0.3 (secondary) and are unable to ping FW1 (primary) 192.168.0.2 or the VIP 192.168.0.1.

clients on another zone can also ping devices on the LAN without issues. ex: ping 192.168.0.10/24

 

my question, why can't i ping the VIP 192.168.0.1 from the DMZ zone. shouldn't the VIP be accessible on both Active and Secondary firewalls.

1 REPLY 1

Cyber Elite
Cyber Elite

ARP can be a tricky creature if your network devices don't want to play along

your switch (or router) may be 'locking' the virtual IP/MAC of the firewall on one port, or the IP to one MAC, causing this behavior

are you able to verify this? (you should be able to packetcapture ARP at the router to see if you're getting onl;y one reply, and looking at the MAC table for the switch to see if it's associating the IP to just one port or something)

Tom Piens
PANgurus - Strata specialist; config reviews, policy optimization
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