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New Contributor

SIP Proxy not working with VRRP VIP

I am working on putting together a dual WAN, "high availability" topology with a pair of 3140's. This will be to support our hosted IP phones, leveraging the SIP proxy functionality. I am using VRRP on my LAN interfaces to facilitate failover for the voice LAN. We have used the SIP proxy functionality on the 3140 for single box, single WAN, and dual WAN builds, but this is the first time we've tried to grow the built to leverage two 3140's.

In my lab, I have successfully achieved IP failover from one box to the other using track statements on my primary 3140's VRRP instance to decrement the VRRP priority. Everything was working swimmingly until I actually went to connect a phone.

I found that with VRRP enabled, the Adtran will not intercept and proxy the SIP traffic. I confirmed this by rebooting the phone several times, watching "debug sip stack messages" and IP policy-sessions. It's as if the Adtran completely ignores SIP traffic sent to the VRRP VIP. As soon as I tear down the VRRP instance and place the default gateway IP on the interface (like I would in a single box build), everything works fine.

Below is my interface config with VRRP:

interface gigabit-eth 0/1.20

  description VOIP LAN

  vlan-id 20

  ip address  10.10.20.252  255.255.255.0

  no ip proxy-arp

  ip access-policy VOIP-Private

  vrrp 1 ip 10.10.20.254

  vrrp 1 priority 110

  vrrp 1 track HA_FAILOVER decrement 30

  media-gateway ip primary

  no shutdown

When my phone attempts to register, I see SIP traffic hitting the VRRP VIP on the firewall, but "debug sip stack messages" captures no messages. All I see is:

Policy class "VOIP-Private":

udp (60) -> self

  10.10.20.1      5060 10.10.20.254    5060

As soon as I modify the config to a standard, single box interface IP config, the Adtran intercepts and proxies SIP traffic as normal.

interface gigabit-eth 0/1.20

  description VOIP LAN

  vlan-id 20

  ip address  10.10.20.254  255.255.255.0

  no ip proxy-arp

  ip access-policy VOIP-Private

  media-gateway ip primary

  no shutdown

Policy class "VOIP-Private":

udp (60) -> self

  10.10.20.1      5060     10.10.20.254    5060

udp (39) -> Public-WAN2

  192.168.2.252   5060     <my sip server>  5060

Again, this is impacting only SIP traffic. All other standard NAT traffic works great. Does Adtran not support SIP proxy with VRRP?


I can post a more full config if necessary, but my build is fairly cookie cutter based on Adtran's published stateful SIP proxy, dual WAN failover, and VRRP guides.

Thanks!

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2 Replies
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Honored Contributor
Honored Contributor

Re: SIP Proxy not working with VRRP VIP

Try changing your interface configuration from:

media-gateway ip primary

to:

media-gateway ip primary vrrp

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New Contributor

Re: SIP Proxy not working with VRRP VIP

That's actually very obvious now that you point it out.

Thanks!