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892 BigIron RX Series Configuration Guide
53-1001810-01
Configuring IPv4 address family route parameters
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If you need to disable padding, you can do so globally or on individual interfaces. Generally, you do
not need to disable padding unless a link is experiencing slow performance. If you enable or
disable padding on an interface, the interface setting overrides the global setting.
To globally disable padding of IS-IS hello PDUs, enter the following command.
BigIron RX(config-isis-router)# no hello padding
This command disables all hello PDU padding on the
device
. To re-enable padding, enter the
following command.
BigIron RX(config-isis-router)# hello padding
Syntax: [no] hello padding
By default, hello padding is enabled. Enter the no form of the command to disable hello padding.
To disable hello padding on an interface, refer to “Disabling and enabling hello padding on an
interface” on page 901.
Logging adjacency changes
The
device
can generate a Syslog entry and an SNMP trap to indicate a change in the status of
an adjacency with another IS. Logging of the adjacency changes is disabled by default. To enable or
disable them, use either of the following methods.
To enable logging of adjacency changes, enter the following command.
BigIron RX(config-isis-router)# log-adjacency-changes
Syntax: [no] log-adjacency-changes
To disable logging of adjacency changes, enter the following command.
BigIron RX(config-isis-router)# no log-adjacency-changes
Disabling partial SPF calculations
By default, IS-IS makes incremental changes to the routing table when changes to the network
occur. A full SPF calculation is not performed unless there is a substantial change in the network;
for example when an IS-IS link flaps in the network. You can optionally configure IS-IS to perform a
full SPF calculation when any changes occur in the network.
To disable partial SPF calculations for IS-IS, enter the following command.
BigIron RX(config-isis-router)# disable-partial-spf-opt
Syntax: [no] disable-partial-spf-opt
Configuring IPv4 address family route parameters
This section describes how to modify the IS-IS parameters for the IS-IS IPv4 unicast address family.
To enter the IPv4 unicast address family, refer to
“Address family configuration level” on page 884.