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Site-to-Site VPN tunnel bandwidth for voice traffic

femi.agboade
Level 1
Level 1

Hello,

I have some challenges with a VPN config I recently setup for a client.

I have at the HO the following:

- 1800 router

- Avaya phones and Gateway

- 1MB radio internet access

At the BO(branch office), i have:

- 871 Router

- Avaya phones

- 256k internet bandwidth

The only reason we setup the VPN in the first place was for the phones at the BO to be able to connect to the gateway at the HO and also able to make calls and receive calls as if the phones were at the HO.

The phones at the BO successfully register to the HO, but are unable to recieve calls and dial out. Everytime I try to make a call, the phone displays a "connecting..." message.

Please see the attached config files.

Could it be the bandwidth of the VPN tunnel because when i checked sh int tunnel, i got the message below:

Tunnel0 is up, line protocol is up

  Hardware is Tunnel

  Description: Tunnel to HO

  Internet address is 192.168.200.2/30

  MTU 1514 bytes, BW 9 Kbit/sec, DLY 500000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation TUNNEL, loopback not set

  Keepalive not set

  Tunnel source 2.2.2.2, destination 1.1.1.1

  Tunnel protocol/transport IP/IP

  Tunnel TTL 255

  Fast tunneling enabled

  Tunnel transmit bandwidth 8000 (kbps)

  Tunnel receive bandwidth 8000 (kbps)

  Last input 00:00:13, output 00:00:13, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1419

  Queueing strategy: fifo

  Output queue: 0/0 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     2376 packets input, 293066 bytes, 0 no buffer

     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     4453 packets output, 634702 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 output buffer failures, 0 output buffers swapped out

Any suggestions please will be very welcomed.

Regards,

Femi

2 Replies 2

mvsheik123
Level 7
Level 7

Hi,

I guess Avaya uses h323. Have you tried by removing 'ip inspect name DEFAULT100 h323' on both ends?

hth

MS

Hello MS,

I have just tried your suggestion but with no luck. Any other ideas? Anyone? This is becoming embarassing

Regards,

Femi