ITC-2300 VoIP Lab Switch and Router Configurations

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Notes

Don't forget to modify for the information specific to your Pod:

  • Change the hostname of both the Router and Switch to include your Pod Number
  • Change the IP Address on the Router Fa0/0 interface to the correct IP for your pod

You may want to make some additional changes for administration ease:

  • Set an enable secret
  • Setup a username and secret on both devices
  • Setup SSH on both devices

Basic Router Configuration

hostname PodX-Router
!
ip dhcp excluded-address 192.168.10.1 192.168.10.20
!
ip dhcp pool internal-voip
   network 192.168.10.0 255.255.255.0
   dns-server 172.17.139.10
   default-router 192.168.10.1
   option 150 ip 192.168.10.3
!
interface FastEthernet0/0
 ip address 172.17.144.XX 255.255.255.0
 ip nat outside
 no shutdown
!
interface FastEthernet0/1
 no shutdown
!
interface FastEthernet0/1.10
 encapsulation dot1Q 10
 ip address 192.168.10.1 255.255.255.0
 ip nat inside
 no shutdown
!
ip route 0.0.0.0 0.0.0.0 172.17.144.1
!
ip nat inside source list 1 interface FastEthernet0/0 overload
!
access-list 1 permit 192.168.10.0 0.0.0.255

Basic Switch Configuration

hostname PodX-Switch
!
vtp mode transparent
!
vlan 10
!
spanning-tree portfast default
!
!
interface GigabitEthernet1/0/1
 description Asterisk Server PC
 switchport access vlan 10
 switchport mode access
!
interface GigabitEthernet1/0/2
 description VoIP Phone 1
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 10
 spanning-tree portfast
!
interface GigabitEthernet1/0/3
 description VoIP Phone 2
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 10
 spanning-tree portfast
!
interface GigabitEthernet1/0/10
 description Second PC
 switchport access vlan 10
 spanning-tree portfast
!
!
interface GigabitEthernet1/0/24
 description Trunk Connection to Router
 switchport mode trunk
 no shutdown
!
interface Vlan10
 ip address 192.168.10.2 255.255.255.0
!
ip route 0.0.0.0 0.0.0.0 192.168.10.1
!

Adding ISDN <-> SIP Gateway Support to the Router

!
card type t1 0 3
!
isdn switch-type primary-ni
!
network-clock-participate wic 3
!
voice service voip
 sip
  bind control source-interface FastEthernet0/1.10
  bind media source-interface FastEthernet0/1.10
!
controller T1 0/3/0
 framing esf
 linecode b8zs
 clock source line
 pri-group timeslots 1-6
!
ip access-list extended block-sip-outside
 ! change the next two lines to have the correct outside IP address for your router
 deny   tcp any host 172.17.144.XX eq 5060
 deny   udp any host 172.17.144.XX eq 5060
 permit ip any any
ip access-list extended block-sip-inside
 permit udp host 192.168.10.3 host 192.168.10.1 eq 5060
 deny   tcp any host 192.168.10.1 eq 5060
 deny   udp any host 192.168.10.1 eq 5060
 permit ip any any
!
interface FastEthernet0/0
 ip access-group block-sip-outside in
!
interface FastEthernet0/1.10
 ip access-group block-sip-inside in
!
dial-peer voice 1 pots
 description Calls from Asterisk to PSTN
 destination-pattern .T
 port 0/3/0:23
!
dial-peer voice 2 voip
 description Calls from PSTN to Asterisk
 ! change the two ZZs in the next line to match the incoming numbers for your pod (the last two characters should be periods)
 destination-pattern 510555ZZ..
 session protocol sipv2
 session target ipv4:192.168.10.3:5060
 incoming called-number .T
 dtmf-relay rtp-nte
 codec g711ulaw
 no vad
!
dial-peer voice 3 pots
 description Inbound calls from PSTN
 incoming called-number .T
 direct-inward-dial
 port 0/3/0:23
!
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