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This section provides specific configuration examples for different VoFR connections and call type scenarios. This section includes the following examples:
The examples do not provide complete configurations, but show the required commands to configure Voice over Frame Relay.
Figure 8 shows an example of Frame Relay fragmentation between two routers.
| Router A (Cisco 3600) | Router B (Cisco 3600) |
|---|---|
interface serial 0/0 | interface serial 0/0 |
ip address xxx.xxx.xxx | ip address xxx.xxx.xxx |
frame-relay traffic shaping | frame-relay traffic shaping |
frame-relay class toto | |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 |
class toto | |
map-class frame-relay toto | |
map-class frame-relay toto | encapsulation frame-relay |
encapsulation frame-relay | frame-relay cir s |
frame-relay cir s | frame-relay bc u |
frame-relay bc u | frame-relay fragment y |
frame-relay fragment y |
This configuration uses FRF.12 fragmentation.
Figure 9 shows an example of two routers with connections using a VoFR PVC.
| Router A (Cisco 3600) | Router B (Cisco 3600) |
|---|---|
interface serial 0/0 | interface serial 0/0 |
frame-relay traffic shaping | frame-relay traffic shaping |
frame-relay class toto | |
frame-relay interface-dlci 100 | |
vofr data z | frame-relay interface-dlci 100 |
class toto | vofr data z |
map-class frame-relay toto | map-class frame-relay toto |
frame-relay voice-bandwidth t | frame-relay voice-bandwidth t |
frame-relay min-cir x | frame-relay min-cir x |
frame-relay cir s | frame-relay cir s |
frame-relay bc u | frame-relay bc u |
frame-relay fragment y | frame-relay fragment y |
This configuration uses FRF.11 Annex C fragmentation.
Figure 10 shows an example of a Cisco 3600 series router with connections to a Cisco MC3810 using a VoFR PVC. In this example, the Voice over Frame Relay interface on the Cisco MC3810 is configured using the vofr cisco command.
| Router A (Cisco 3600) | Router B (Cisco MC3810) |
|---|---|
interface serial 0/0 | interface serial 0 |
ip address xxx.xxx.xxx | ip address xxx.xxx.xxx |
frame-relay traffic shaping | frame-relay traffic shaping |
frame-relay class toto | |
frame-relay interface-dlci 100 | |
vofr cisco | frame-relay interface-dlci 100 |
class toto | vofr cisco |
map-class frame-relay toto | map-class frame-relay toto |
frame-relay voice-bandwidth t | frame-relay voice-bandwidth t |
frame-relay min-cir x | frame-relay min-cir x |
frame-relay cir s | frame-relay cir s |
frame-relay bc u | frame-relay bc u |
frame-relay fragment y | frame-relay fragment y |
This configuration uses FRF.11 Annex C fragmentation.
On the Cisco MC3810, there are two different configuration methods for configuring Voice over Frame Relay on an interface. You can either use the vofr cisco command or the frame-relay interface-dlci dlci voice-encap size command. The first configuration method uses the vofr cisco command, which automatically provides support for weighted fair queuing and matches the configuration method supported on the Cisco 2600 and Cisco 3600 series routers.
The second configuration method uses the frame-relay interface-dlci voice-encap command, which does not automatically provide support for any queuing mechanism. However, if you enter the no frag-pre-queuing command, you can then statically configure either weighted fair queuing, priority queuing, or custom queuing on the interface. This second configuration method can be used to configure VoFR connections to Cisco 2600 and Cisco 3600 series routers.
You must choose one configuration method, because these commands are mutually exclusive on an interface.
Figure 11 shows an example of a VoFR PVC between two Cisco MC3810 concentrators, with each concentrator using a different VoFR configuration method. In this example, the VoFR PVC on the first Cisco MC3810 is configured using the vofr cisco command, while on the second concentrator, the VoFR PVC is configured using the frame-relay interface-dlci voice-encap command.
| Router A (Cisco MC3810) | Router B (Cisco MC3810) |
|---|---|
interface serial 0 | interface serial 0 |
ip address xxx.xxx.xxx | ip address xxx.xxx.xxx |
frame-relay traffic shaping | frame-relay traffic shaping |
frame-relay class toto | |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 |
vofr cisco | no frag-pre-queuing |
class toto | fair-queue 64 512 18 |
map-class frame-relay toto | map-class frame-relay toto |
frame-relay min-cir in x | frame-relay min-cir in x |
frame-relay cir s | frame-relay cir s |
frame-relay bc u | frame-relay bc u |
frame-relay fragment y | frame-relay fragment y |
frame-relay voice-bandwidth t |
This configuration uses FRF.11 Annex C fragmentation.
Figure 12 shows an example of VoFR Cisco-trunk (private line) calls between two routers.
| Router A (Cisco 3600) | Router B (Cisco MC3810) |
|---|---|
interface serial 0/0 | interface serial 0 |
ip address xxx.xxx.xxx | ip address xxx.xxx.xxx |
encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic shaping | frame-relay traffic shaping |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 |
class voice | class voice |
vofr cisco | vofr cisco |
map-class frame-relay voice | map-class frame-relay voice |
frame relay cir s | frame relay cir s |
frame relay bc u | frame relay bc u |
frame-relay voice bandwidthv | frame-relay voice bandwidthv |
frame-relay min-cir x | frame-relay min-cir x |
frame-relay fragment y | frame-relay fragment y |
voice-port 2/0/0 | voice-port 1/5 |
connection trunk 6001 answer-mode | connection trunk 7001 |
dial-peer voice 1 pots | dial-peer voice 2 pots |
destination-pattern 7001 | destination-pattern 6001 |
port 2/0/0 | port 1/5 |
dial-peer voice 2 vofr | dial-peer voice 4 vofr |
codec x bytes y | codec x bytes y |
destination-pattern 6001 | destination-pattern 7001 |
session protocol cisco-switched | session protocol cisco-switched |
session target Sn 100 | session target Sn 100 |
Figure 13 shows an example of FRF.11 trunk calls configured between two routers.
| Router A (Cisco 3600) | Router B (Cisco MC3810) |
|---|---|
interface serial 0/0 | interface serial 0 |
ip address xxx.xxx.xxx | ip address xxx.xxx.xxx |
encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic shaping | frame-relay traffic shaping |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 |
class voice | class voice |
vofr data 4 | vofr data 4 |
map-class frame-relay voice | map-class frame-relay voice |
frame relay cir s | frame relay cir s |
frame-relay min-cir in x | frame-relay min-cir in x |
frame relay bc u | frame relay bc u |
frame-relay voice bandwidthv | frame-relay voice bandwidth v |
frame-relay fragment y | frame-relay fragment y |
voice-port 2/0/0 | voice-port 1/5 |
connection trunk 6001 | connection trunk 7001 |
dial-peer voice 1 pots | dial-peer voice 2 pots |
destination-pattern 7001 | destination-pattern 6001 |
port 2/0/0 | port 1/5 |
dial-peer voice 2 vofr | dial-peer voice 4 vofr |
codec x bytes y bytes | codec x bytes y |
destination-pattern 6001 | destination-pattern 7001 |
session protocol frf11-trunk | session protocol frf11-trunk |
session target Sn 100 d | session target Sn 100 d |
called-number 7001 | dtmf-relay |
dtmf-relay | vad |
vad |
Figure 14 shows an example of a tandem configuration with two Cisco 3600 routers as endpoints, and a third Cisco 3600 as a tandem node.
| Router A (Cisco 3600) Endpoint | Router C (Cisco 3600) Tandem Node | Router B (Cisco 3600) Endpoint |
|---|---|---|
interface serial 0/0 | interface serial 0/0 | interface serial 0/0 |
encapsulation frame-relay | encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic-shaping | frame-relay traffic-shaping | frame-relay traffic-shaping |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 | frame-relay interface-dlci 100 |
class voice | class voice | class voice |
vofr data 4 call-control 5 | vofr data 4 call-control 5 | vofr data 4 call-control 5 |
map-class frame-relay voice | interface serial 0/1 | map-class frame-relay voice |
frame-relay cir a | encapsulation frame-relay | frame-relay cir a |
frame-relay min-cir t | frame-relay traffic-shaping | frame-relay min-cir t |
frame-relay bc b | frame-relay interface-dlci 200 | frame-relay bc b |
frame-relay voice bandwidth c | class voice | frame-relay voice bandwidth c |
frame-relay fragment d | vofr | frame-relay fragment d |
dial-peer voice 1 pots | map-class frame-relay voice | dial-peer voice 1 pots |
destination-pattern 1001 | frame-relay cir a | destination-pattern 2001 |
port 1/0/0 | frame-relay min-cir t | port 1/0/0 |
frame-relay bc b | ||
frame-relay voice bandwidth c | ||
dial-peer voice 2 vofr | frame-relay fragment d | dial-peer voice 2 vofr |
destination-pattern 2... | destination-pattern 1... | |
session target serial 0/0 100 | dial-peer voice 1 vofr | session target serial 0/0 200 |
destination-pattern 1... | ||
voice-port 1/0/0 | session target serial 0/0 100 | voice-port 1/0/0 |
dial-peer voice 2 vofr | ||
destination-pattern 2... | ||
session target serial 0/1 200 |
Figure 15 shows an example of a tandem configuration with a Cisco MC3810 acting as a tandem node.
| Router A (Cisco 3600) Endpoint | Router C (Cisco MC3810) Tandem Node | Router B (Cisco 3600) Endpoint |
|---|---|---|
interface serial 0/0 | interface serial 0 | interface serial 0/0 |
encapsulation frame-relay | encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic-shaping | frame-relay traffic-shaping | frame-relay traffic-shaping |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 | frame-relay interface-dlci 100 |
class voice | class voice | class voice |
vofr cisco | vofr cisco | vofr cisco |
map-class frame-relay voice | interface serial 1 | map-class frame-relay voice |
frame-relay cir a | encapsulation frame-relay | frame-relay cir a |
frame-relay min-cir t | frame-relay traffic-shaping | frame-relay min-cir t |
frame-relay bc b | frame-relay interface-dlci 200 | frame-relay bc b |
frame-relay voice bandwidth c | class voice | frame-relay voice bandwidth c |
frame-relay fragment d | vofr cisco | frame-relay fragment d |
dial-peer voice 1 pots | map-class frame-relay voice | dial-peer voice 1 pots |
destination-pattern 1001 | frame-relay cir a | destination-pattern 2001 |
port 1/0/0 | frame-relay min-cir t | port 1/0/0 |
frame-relay bc b | ||
frame-relay voice bandwidth c | ||
dial-peer voice 2 vofr | frame-relay fragment d | dial-peer voice 2 vofr |
destination-pattern 2... | destination-pattern 1... | |
session target serial 0/0 100 | dial-peer voice 1 vofr | session target serial 0/0 200 |
destination-pattern 1... | ||
voice-port 1/0/0 | session target serial 0/0 100 | voice-port 1/0/0 |
dial-peer voice 2 vofr | ||
destination-pattern 2... | ||
session target serial 0/1 200 |
Figure 16 shows an example of a tandem configuration with a Cisco MC3810 acting as an endpoint node.
| Router A (Cisco 2600) Endpoint | Router C (Cisco 3600) Tandem Node | Router B (Cisco MC3810) Endpoint |
|---|---|---|
interface serial 0/0 | interface serial 0/0 | interface serial 0 |
encapsulation frame-relay | encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic-shaping | frame-relay traffic-shaping | frame-relay traffic-shaping |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 | frame-relay interface-dlci 200 |
class voice | class voice | class voice |
vofr data 4 call-control 5 | vofr data 4 call-control 5 | vofr cisco |
map-class frame-relay voice | interface serial 0/1 | map-class frame-relay voice |
frame-relay cir a | encapsulation frame-relay | frame-relay cir a |
frame-relay min-cir t | frame-relay traffic-shaping | frame-relay min-cir t |
frame-relay bc b | frame-relay interface-dlci 200 | frame-relay bc b |
frame-relay voice bandwidth c | class voice | frame-relay voice bandwidth c |
frame-relay fragment d | vofr cisco | frame-relay fragment d |
dial-peer voice 1 pots | map-class frame-relay voice | dial-peer voice 1 pots |
destination-pattern 1001 | frame-relay cir a | destination-pattern 2001 |
port 1/0/0 | frame-relay min-cir t | port 1/1 |
frame-relay bc b | ||
frame-relay voice bandwidth c | ||
dial-peer voice 2 vofr | frame-relay fragment d | dial-peer voice 2 vofr |
destination-pattern 2001 | destination-pattern 1001 | |
session target serial 0/0 100 | dial-peer voice 1 vofr | session target serial 0 200 |
destination-pattern 1001 | ||
voice-port 1/0/0 | session target serial 0/0 100 | voice-port 1/1 |
dial-peer voice 2 vofr | ||
destination-pattern 2001 | ||
session target serial 0/1 200 |
Figure 17 shows an example of a tandem configuration with a Cisco MC3810 acting as an endpoint node for Cisco-trunk (private line) calls.
| Router A (Cisco 2600) Endpoint | Router C (Cisco 3600) Tandem Node | Router B (Cisco MC3810) Endpoint |
|---|---|---|
interface serial 0/0 | interface serial 0/0 | interface serial 0 |
encapsulation frame-relay | encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic-shaping | frame-relay traffic-shaping | frame-relay traffic-shaping |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 | frame-relay interface-dlci 200 |
class voice | class voice | class voice |
vofr data 4 call-control 5 | vofr data 4 call-control 5 | vofr cisco |
map-class frame-relay voice | interface serial 0/1 | map-class frame-relay voice |
frame-relay cir a | encapsulation frame-relay | frame-relay cir a |
frame-relay min-cir t | frame-relay traffic-shaping | frame-relay min-cir t |
frame-relay bc b | frame-relay interface-dlci 200 | frame-relay bc b |
frame-relay voice bandwidth c | class voice | frame-relay voice bandwidth c |
frame-relay fragment d | vofr cisco | frame-relay fragment d |
dial-peer voice 1 pots | map-class frame-relay voice | dial-peer voice 1 pots |
destination-pattern 1001A | frame-relay cir a | destination-pattern 2001A |
port 1/0/0 | frame-relay min-cir t | port 1/1 |
frame-relay bc b | ||
dial-peer voice 2 vofr | frame-relay voice bandwidth c | dial-peer voice 2 vofr |
destination-pattern 2... | frame-relay fragment d | destination-pattern 1... |
session target serial 0/0 100 | session target serial 0 200 | |
dial-peer voice 1 vofr | ||
voice-port 1/0/0 | destination-pattern 1... | voice-port 1/1 |
connection trunk 2001A answer-mode | session target serial 0/0 100 | connection trunk 1001A |
dial-peer voice 2 vofr | ||
destination-pattern 2... | ||
session target serial 0/1 200 |
Figure 18 shows an example of a tandem configuration with Cisco MC3810 concentrators as both endpoint and tandem nodes.
| Router A (Cisco MC3810) Endpoint | Router C (Cisco MC3810) Tandem Node | Router B (Cisco MC3810) Endpoint |
|---|---|---|
interface serial 0 | interface serial 0 | interface serial 0 |
encapsulation frame-relay | encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic-shaping | frame-relay traffic-shaping | frame-relay traffic-shaping |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 | frame-relay interface-dlci 200 |
class voice | class voice | class voice |
vofr cisco | vofr cisco | vofr cisco |
map-class frame-relay voice | interface serial 1 | map-class frame-relay voice |
frame-relay cir a | encapsulation frame-relay | frame-relay cir a |
frame-relay bc b | frame-relay traffic-shaping | frame-relay bc b |
frame-relay voice bandwidth c | frame-relay interface-dlci 200 | frame-relay voice bandwidth c |
frame-relay min-cir t | class voice | frame-relay fragment d |
vofr cisco | frame-relay min-cir t | |
dial-peer voice 1 pots | map-class frame-relay voice | dial-peer voice 1 pots |
destination-pattern 1001 | frame-relay cir a | destination-pattern 2001 |
port 1/1 | frame-relay min-cir t | port 1/1 |
frame-relay bc b | ||
dial-peer voice 2 vofr | frame-relay voice bandwidth c | dial-peer voice 2 vofr |
destination-pattern 2... | frame-relay fragment d | destination-pattern 1... |
session target serial 0 100 | session target serial 0 200 | |
dial-peer voice 1 vofr | ||
voice-port 1/1 | destination-pattern 1... | voice-port 1/1 |
session target serial 0 100 | ||
dial-peer voice 2 vofr | ||
destination-pattern 2... | ||
session target serial 1 200 |
Figure 19 shows an example of a Cisco trunk (private line) call with hunt groups configured. In this example, the two routers are in master-slave mode with a backup path. Router B is configured as a slave and Router A is configured as the master. The master makes periodic attempts to establish the trunk until the trunk is established. Two dial peers match the destination string configured in the voice port, but because one dial peer has a higher preference, the call setup is attempted through that dial peer. If the call setup fails, the master can continue attempting call setups using the next available dial peer. After all dial peers are exhausted, the master can continue following the list cyclically by starting again from the dial peer with the highest preference.
| Router A (Cisco MC3810) | Router B (Cisco MC3810) |
|---|---|
interface serial 0 | interface serial 0 |
encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic-shaping | frame-relay traffic-shaping |
frame-relay interface-dlci 100 | frame-relay interface-dlci 100 |
class voice | class voice |
vofr cisco | vofr cisco |
interface serial 1 | interface serial 1 |
encapsulation frame-relay | encapsulation frame-relay |
frame-relay traffic-shaping | frame-relay traffic-shaping |
frame-relay interface-dlci 200 | frame-relay interface-dlci 200 |
class voice | class voice |
vofr cisco | vofr cisco |
map-class frame-relay voice | map-class frame-relay voice |
frame-relay cir a | frame-relay cir a |
frame-relay bc b | frame-relay bc b |
frame-relay voice bandwidth c | frame-relay voice bandwidth c |
frame-relay min-cir t | frame-relay min-cir t |
dial-peer voice 1 pots | dial-peer voice 1 pots |
destination-pattern 1001A | destination-pattern 2001A |
port 1/1 | port 1/1 |
dial-peer voice 100 vofr | dial-peer voice 100 vofr |
destination-pattern 2... | destination-pattern 1... |
session target serial0 100 | session target serial0 100 |
preference 1 | preference 1 |
dial-peer voice 200 vofr | dial-peer voice 200 vofr |
destination-pattern 2... | destination-pattern 1... |
session target serial1 200 | session target serial1 200 |
preference 2 | preference 2 |
voice-port 1/1 | voice-port 1/1 |
connection trunk 2005A | description FXS port |
description FXO port | connection trunk 1001A answer-mode |
Posted: Thu Apr 29 18:05:59 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.