Foundry Networks Switch and Router, Installation And Configuration Manual, Page: 168 / 1070

Foundry Switch and Router Installation and Configuration Guide
6 - 6 December 2000
Syntax: [no] ip address <ip-addr>/<mask-bits> [secondary]
Use the secondary parameter if you have already configured an IP address within the same sub-net on the
interface.
Changing the Interface State
The POS interfaces are enabled by default. To disable or reenable an interface, use the following method.
USING THE CLI
To disable POS interface 2/1, enter the following commands:
BigIron(config)# interface pos 2/1
BigIron(config-posif-2/1)# disable
BigIron(config-posif-2/1)# write memory
Syntax: disable
To reenable POS interface 2/1, enter the following commands:
BigIron(config)# interface pos 2/1
BigIron(config-posif-2/1)# enable
BigIron(config-posif-2/1)# write memory
Syntax: enable
Changing the Encapsulation Type
Foundry POS interfaces use the PPP encapsulation type by default. You can change the encapsulation type of an
interface to HDLC or Frame Relay, or back to PPP using the following method.
NOTE: Both ends of the POS link must use the same encapsulation type.
USING THE CLI
To configure POS interface 2/1 to use HDLC, enter the following commands:
BigIron(config)# interface pos 2/1
BigIron(config-posif-2/1)# encapsulation hdlc
BigIron(config-posif-2/1)# write memory
Syntax: [no] encapsulation hdlc | ppp | frame-relay [ietf]
NOTE: If you are configuring a Frame Relay interface, see “Configuring POS for Frame Relay” on page 6-10.
Changing the Clock Source
Foundry POS interfaces use the network as the clock source by default. You can change the clock source for an
interface to internal, which causes the interface to use clock information from the POS module itself as the
clocking source.
If you are connecting two Foundry POS modules back-to-back or the POS interfaces are connected by a fiber link
that has no clocking information on it, use the internal clock source. Otherwise, use the network (line) as the
source.
To change the clock source, use the following method.
USING THE CLI
To change the clock source for POS interface 2/1 to internal (the POS module itself), enter the following
commands:
BigIron(config)# interface pos 2/1
BigIron(config-posif-2/1)# clock internal
BigIron(config-posif-2/1)# write memory