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andrew_C1's avatar
andrew_C1
Icon for Nimbostratus rankNimbostratus
Jan 29, 2016

VIP with irule hosting HTTP response not responding to ARP

As per the title,

if i static arp on the client i get to the HTTP page and get the expected response. I have TCPDumped the interface and can see the incomming ARP frames, F5 just isn't responding.

12:08:57.957310 arp who-has 192.168.16.23 tell 192.168.16.145
12:09:00.769257 arp who-has 192.168.16.23 tell 192.168.16.145
12:09:01.458528 arp who-has 192.168.16.23 tell 192.168.16.145
12:09:02.457333 arp who-has 192.168.16.23 tell 192.168.16.145
12:09:06.767878 arp who-has 192.168.16.23 tell 192.168.16.145
12:09:07.457120 arp who-has 192.168.16.23 tell 192.168.16.145
12:09:08.457004 arp who-has 192.168.16.23 tell 192.168.16.145
12:09:17.133658 arp who-has 192.168.18.23 (ff:ff:ff:ff:ff:ff) tell 192.168.18.23
12:09:17.143121 arp who-has 192.168.18.23 (ff:ff:ff:ff:ff:ff) tell 192.168.18.23
12:09:17.152998 arp who-has 192.168.18.23 (ff:ff:ff:ff:ff:ff) tell 192.168.18.23
12:09:17.163152 arp who-has 192.168.18.23 (ff:ff:ff:ff:ff:ff) tell 192.168.18.23
12:09:17.173184 arp who-has 192.168.18.23 (ff:ff:ff:ff:ff:ff) tell 192.168.18.23

Yes ARP is enabled on the Virtual Address.

root@(dc1-f5-swg)(cfg-sync In Sync)(/S1-green-P:Eval:Active)(/GUEST-SWG-PARTITION)(tmos) list ltm virtual-address /GUEST-SWG-PARTITION/192.168.18.23%2 
ltm virtual-address 192.168.18.23%2 {
    address 192.168.18.23
    mask 255.255.255.255
    partition GUEST-SWG-PARTITION
    traffic-group /Common/traffic-group-1
}
root@(dc1-f5-swg)(cfg-sync In Sync)(/S1-green-P:Eval:Active)(/GUEST-SWG-PARTITION)(tmos) list ltm virtual-address /GUEST-SWG-PARTITION/192.168.18.23%2 arp
ltm virtual-address 192.168.18.23%2 {
    arp enabled
}

Anyone seen anything like this or have any ideas?

  1. 6 HF5

cheers

application delivery
arp
iRules
LTM

2 Replies

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  • Kai_Wilke's avatar
    Kai_Wilke
    Icon for MVP rankMVP
    Jan 29, 2016

    Hi Andrew,

    could be a Route Domain related problem. If you compare your listings with ours...

    ltm virtual-address 172.21.17.210%1 {
    address 172.21.17.210%1
    mask 255.255.255.255
    traffic-group traffic-group-1
}

    ... you will see that our "address" does have a Route Domain suffix specified. Your "address" does not have a Route Domain, but your "virtual-address" name is including a %2 notation?

    Cheers, Kai

  • andrew_C1's avatar
    andrew_C1
    Icon for Nimbostratus rankNimbostratus
    Jan 31, 2016

    Issue was fixed by rebooting (sigh). I was actual wrong above at first the VIP was answering, but later on it stopped responding completely(no idea why) and then traffic was being caught by another vip (0.0.0.0/0 vip).

     

    On route domains, i always roll with a 1:1 mapping of route domains to partitions. Depending where i am on TMSH (/Common/ or somewhere else) the route domain id might or might not be there, but because of the 1:1 mapping i never specific directly route domain id's in addresses thus i never have that issue :).

     

    cheers