Paging over VPN???

[quazimotto]

Greetings All!

Can I get my CME to page an offsite group connected via VPN?

Thank you for all replies.

Quaz

 

[jeter]

I would say YES given that the phones are registered with CME and you set them in a paging group.... Verify QOS!!!!


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Tek-TIP Member 19,650

 

[quazimotto]

Jeter,

The phones register and are a part of the paging group. When I page I can see the phone responding to the page by showing "Paging Group 1 " on the telephone, but no audio can be heard.

Quaz

 

[jeter]

Maybe a routing issue? Verify your routes to and from the vpn...

Are you testing from a remote site or from another phone via the vpn?


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Tek-TIP Member 19,650

 

[brianinms]

Isn't a page a multicast stream? Thus a standard IPSEC VPN wont work.

 

[jeter]

That's a good thought, I am not a vpn expert so I do not have the answer... (paging ip 239.1.1.1 port 2000).


I did pool up TAC case collection on one way audio regarding
IPSEC/VPN issues (Solution# K21063671).






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Tek-TIP Member 19,650

 

[brianinms]

Jeter, yes that would mean the page is a multicast stream. Thus the only way for it to work would be IPSEC in a gre tunnel.

 

[jeter]

Reading more into this and it appears you are correct.

Hopefully the Cisco Solution will help resolve this problem...



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Tek-TIP Member 19,650

 

[whykap]

brianims is correct.
paging needs multicast enabled through a GRE tunnel.
it is a simple configuration.

 

[quazimotto]

Great Stuff, Guys!! What is a GRE VPN tunnel?

 

[whykap]

GRE stands for generic routing encapsulation.
Here is a link for multicast over GRE:

http://www.cisco.com/en/US/tech/tk828/technologies_configuration_example09186a00801a5aa2.shtml

Do a search on cco for the exact VPN configuration you have and how to add a GRE tunnel.

 

[quazimotto]

Thank you all for your comments and help.

Quaz