CME over WAN

softestpleasesoftestplease Junior MemberMember Posts: 14 ■□□□□□□□□□
in CCNP Collaboration
RouterA
RouterB
RouterC
---192.168.0.25---192.168.0.26---192.168.0.29---192.168.0.30

RouterA phone 1000
RouterB phone 2000
RouterC phone 3000
ospf/eigrp routing apply

Hi expert,

I tried to configure so RouterA can call RouterC from the topology above.

I can call RouterC with no issue from RouterA if I bind RouterC's IP into RouterA's session target
RouterA:
dial-peer voice 3000 voip
destination-pattern 3000
session target ipv4:192.168.0.30 (RouterC serial int)
codec g711alaw

However,

If I bind RouterA's session target with the next hop IP address which is RouterB's IP(192.168.0.26), then the call was not successful.

Is there any way for RouterB forward the voice packet that originated from RouterA to RouterC?

RouterA:
dial-peer voice 3000 voip
destination-pattern 3000
session target ipv4:192.168.0.26 (RouterB serial int - next hop)
codec g711alaw

RouterB:
dial-peer voice 3000 voip
destination-pattern 3000
session target ipv4:192.168.0.30 (RouterC serial int - next hop)
codec g711alaw


Thanks in advance
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Comments

  • pitviperpitviper Member Posts: 1,376 ■■■■■■■□□□
    Are they all on the same /24 subnet? If so, then plug 1 ethernet interface on each router into a switch and it should work fine.

    Or separate them into 2 networks so that the routers can actually…umm, route :)

    RouterA
    RouterB
    RouterC
    ---192.168.0.1---192.168.0.2---192.168.1.2---192.168.1.1
    CCNP:Collaboration, CCNP:R&S, CCNA:S, CCNA:V, CCNA, CCENT
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  • softestpleasesoftestplease Junior Member Member Posts: 14 ■□□□□□□□□□
    thanks pitviper for your reply

    They are on different subnet tho
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  • pitviperpitviper Member Posts: 1,376 ■■■■■■■□□□
    softestplease wrote: »
    They are on different subnet tho

    Not possible with the 4 IPs that you posted - what netmasks are you using?
    CCNP:Collaboration, CCNP:R&S, CCNA:S, CCNA:V, CCNA, CCENT
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  • pitviperpitviper Member Posts: 1,376 ■■■■■■■□□□
    You shouldn’t need to terminate the 3000 extensions on router B – Assuming basic routing is working, it’ll just pass the packets along based on the target CME IP address.
    CCNP:Collaboration, CCNP:R&S, CCNA:S, CCNA:V, CCNA, CCENT
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  • softestpleasesoftestplease Junior Member Member Posts: 14 ■□□□□□□□□□
    pitviper wrote: »
    You shouldn’t need to terminate the 3000 extensions on router B – Assuming basic routing is working, it’ll just pass the packets along based on the target CME IP address.

    hi pitviper, thanks again for your reply
    and yes you're right about the ip addresses I was provided earlier was wrong (I have fixed it).. I'm really sorry about that... that is why I need an advice from the expert :)

    so basically RouterA have 6 phones, RouterB 5 phones and RouterC 4 phones.
    here is the VLSM
    RouterA: 192.168.0.1 - 192.168.0.6 /29
    RouterB: 192.168.0.9 - 192.168.0.14 /29
    RouterC: 192.168.0.17 - 192.168.0.22 /29

    Thanks again, I really appreciated it
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  • softestpleasesoftestplease Junior Member Member Posts: 14 ■□□□□□□□□□
    pitviper wrote: »
    You shouldn’t need to terminate the 3000 extensions on router B – Assuming basic routing is working, it’ll just pass the packets along based on the target CME IP address.

    I can ping ok from all Router to another Router...however, for some reason... I cannot call from RouterA to RouterC.

    Unless I insert Router'C ip address on RouterA's session target...

    Cheers
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  • pitviperpitviper Member Posts: 1,376 ■■■■■■■□□□
    Hmm, OK you should have the following voip dial-peers:

    Router A -
    Destination-pattern 2... (serial or Ethernet IP of Router B)
    Destination-pattern 3... (serial or Ethernet IP of Router C)

    Router B -
    Destination-pattern 1... (serial or Ethernet IP of Router A)
    Destination-pattern 3... (serial or Ethernet IP of Router C)

    Router C -
    Destination-pattern 1... (serial or Ethernet IP of Router A)
    Destination-pattern 2... (serial or Ethernet IP of Router B)
    CCNP:Collaboration, CCNP:R&S, CCNA:S, CCNA:V, CCNA, CCENT
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  • softestpleasesoftestplease Junior Member Member Posts: 14 ■□□□□□□□□□
    ok...

    so, there is no other way for RouterB to forward the voice packet that originated from RouterA to RouterC?

    Cheers...
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  • pitviperpitviper Member Posts: 1,376 ■■■■■■■□□□
    Not really - you would need incoming and outgoing call legs with the same destination-pattern.
    CCNP:Collaboration, CCNP:R&S, CCNA:S, CCNA:V, CCNA, CCENT
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  • softestpleasesoftestplease Junior Member Member Posts: 14 ■□□□□□□□□□
    pitviper wrote: »
    Not really - you would need incoming and outgoing call legs with the same destination-pattern.

    cool... thanks again for your help, pitviper
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