Cisco NM-8B-U User Guide - Page 148
Ethernet Switching Examples, Subnets for Voice and Data Example, Inter-VLAN Routing Example
UPC - 074632001001
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16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Configuration Examples for the 16- and 36-Port Ethernet Switch Module Broadcast Suppression Level: 100 Multicast Suppression Level: 70 Unicast Suppression Level: 100 Ethernet Switching Examples • Subnets for Voice and Data Example, page 148 • Inter-VLAN Routing Example, page 148 • Single Subnet Configuration Example, page 149 • Ethernet Ports on IP Phones with Multiple Ports Example, page 149 Subnets for Voice and Data Example The following example shows separate subnets being configured for voice and data on the Ethernet switch network module: interface FastEthernet5/1 description DOT1Q port to IP Phone switchport native vlan 50 switchport mode trunk switchport voice vlan 150 interface Vlan 150 description voice vlan ip address 10.150.1.1 255.255.255.0 ip helper-address 172.20.73.14 (See Note below) interface Vlan 50 description data vlan ip address 10.50.1.1 255.255.255.0 This configuration instructs the IP phone to generate a packet with an 802.1Q VLAN ID of 150 with an 802.1p value of 5 (default for voice bearer traffic). Note In a centralized CallManager deployment model, the DHCP server might be located across the WAN link. If so, an ip helper-address command pointing to the DHCP server should be included on the voice VLAN interface for the IP phone. This is done to obtain its IP address as well as the address of the TFTP server required for its configuration. Cisco IOS supports a DHCP server function. If this function is used, the Ethernet switch network module serves as a local DHCP server and a helper address would not be required. Inter-VLAN Routing Example Configuring inter-VLAN routing is identical to the configuration on a Ethernet switch network module with an MSFC. Configuring an interface for WAN routing is consistent with other Cisco IOS platforms. The following example provides a sample configuration: interface Vlan 160 description voice vlan ip address 10.6.1.1 255.255.255.0 148 Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ