Multicasting in DMVPN

Unanswered Question
Jul 28th, 2008
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Dear All


I had created a DMVPN between 4 diifreent site Hub-Spoke topology, i am using 3com ip phones but i am facing one issue, the issue is i am not able to join confrence (Multiasting) between the spokes, from the hub i can hear both the spoke, but the spoke cannot hear each other. i had enabled ip multicating and Ip pim Saprese-dense mode, the ip telephone comunication between the hub-spoke and spoke-spoke is working, but when i join all in confrence i.e. HUB-Spoke-Spoke it is not working, the hub can hear both but the spoke cannot hear each other.


Please help, its very urgent, thanks in advance

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Marwan ALshawi Mon, 07/28/2008 - 18:28
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it sounds tunneling issue i mean when the tunnel in use between the spokes and the hub no comunication happen between the spokes


i havnt faced isues like this

however try to make another tunnel between the spokes and the hub deffrent IPs

and make a static route for packed distend from spok to another spok to go through the new tunnel


but i am not sure

like u hav ealready tunnel0 make tunnel 1

and static route

i route x.x.x.x x.x.x.x interface tunnel 1

where x.x.x.x/x your spoke network

do it on both sides

Good luck

hussainratlami Thu, 07/31/2008 - 03:04
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Thx for your response Marwanshawi


I sort out the issue, the issue was with Maping, for confrencing of ip phone work between the hub, i had to create the static map for each spoke on the other spoke, i used command

#ip nhrp map "spoke tunnel address" "spoke Public Address"

ip nhrp map multicast "spoke public Address"


After doing this i was able to see all spoke as each other PIM neibhours.


And multicast calls were establish between all sites.


Once again thx for your response.

Have a Good Day.


Hussain

mherald Wed, 07/30/2008 - 21:59
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Can you post you DMVPN specific information? Under the HUB tunnel, do you have plit tunneling turned off? That is the most common reason I have seen for lack of spoke to spoke communication.


Furthermore, do you have it set up for dynamic spoke to spoke (bypass HUB) communication?


Mike

hussainratlami Thu, 07/31/2008 - 03:00
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Thx for your response mike,


I sort out the issue, the issue was with Maping, for confrencing of ip phone work between the hub, i had to create the static map for each spoke on the other spoke, i used command

#ip nhrp map "spoke tunnel address" "spoke Public Address"

ip nhrp map multicast "spoke public Address"


After doing this i was able to see all spoke as each other PIM neibhours.


And multicast calls were establish between all sites.


Once again thx for your response.

Have a Good Day.


Hussain

hussainratlami Thu, 07/31/2008 - 03:05
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Thx for your response mike,


I sort out the issue, the issue was with Maping, for confrencing of ip phone work between the hub, i had to create the static map for each spoke on the other spoke, i used command

#ip nhrp map "spoke tunnel address" "spoke Public Address"

ip nhrp map multicast "spoke public Address"


After doing this i was able to see all spoke as each other PIM neibhours.


And multicast calls were establish between all sites.


Once again thx for your response.

Have a Good Day.


Hussain

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