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Configuring the Router and Switch for DHCP
The appropriate CPE router and switch configurations must be applied to support DHCP. These steps
must be completed by Covad prior to configuring the phones.
As part of router turn-up, add in configuration for DHCP support
On Layer 3 switches, such as the Cisco Catalyst 3560, DHCP must be disabled
8
In addition to the standard configuration applied to the CPE router, the following items
must be configured to support DHCP for the phones. No other DHCP options should be
added.
service dhcp
no ip dhcp conflict logging
ip dhcp excluded-address x.x.x.a
ip dhcp pool phone
network x.x.x.x 255.255.255.y
default-router x.x.x.a
option 66 ascii "TFTP server"
lease 7
If you do not know which TFTP server to use, please check with Covad
Provisioning or Support.
no service dhcp
x.x.x.a is the phone default gateway or
Ethernet interface address
x.x.x.x 255.255.255.y is the phone
network
x.x.x.a is the phone default gateway
or Ethernet interface address
64.2.21.251 (SNVL), 64.2.21.45
(SNJS), 68.165.105.181 (SNVL2) or
72.245.184.75 (DC) is the address of
the TFTP server for this application
Covad Confidential
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