Brocade BigIron RX Series Configuration Guide - Manual (Page 943)

BigIron RX Series Configuration Guide 865
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Changing the keep alive time and hold time
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Changing the keep alive time and hold time
The Keep Alive Time specifies how frequently the router will send KEEPALIVE messages to its BGP4
neighbors. The Hold Time specifies how long the router will wait for a KEEPALIVE or UPDATE
message from a neighbor before concluding that the neighbor is dead. When the router concludes
that a BGP4 neighbor is dead, the router ends the BGP4 session and closes the TCP connection to
the neighbor.
The default Keep Alive time is 60 seconds. The default Hold Time is 180 seconds.
NOTE
Generally, you should set the Hold Time to three times the value of the Keep Alive Time.
NOTE
You can override the global Keep Alive Time and Hold Time on individual neighbors. Refer to
“Configuring BGP4 neighbors” on page 846 and “Configuring a BGP4 peer group” on page 854.
To change the Keep Alive Time to 30 and Hold Time to 90, enter the following command.
BigIron RX(config-bgp)# timers keep-alive 30 hold-time 90
Syntax: timers keep-alive <num> hold-time <num>
For each keyword, <num> indicates the number of seconds. The Keep Alive Time can be 0 –
65535. The Hold Time can be 0 or 3 – 65535 (1 and 2 are not allowed). If you set the Hold Time
to 0, the router waits indefinitely for messages from a neighbor without concluding that the
neighbor is dead.
Changing the BGP4 next-hop update timer
By default, the device updates its BGP4 next-hop tables and affected BGP4 routes five seconds
after IGP route changes. You can change the update timer to a value from 1 – 30 seconds.
To change the BGP4 update timer value, enter a command such as the following at the BGP
configuration level of the CLI.
BigIron RX(config-bgp)# update-time 15
This command changes the update timer to 15 seconds.
Syntax: [no] update-time <secs>
The <secs> parameter specifies the number of seconds and can be from 1 – 30. The default is 5.
Changing the router ID
The OSPF and BGP4 protocols use router IDs to identify the routers that are running the protocols.
A router ID is a valid, unique IP address and sometimes is an IP address configured on the router.
The router ID cannot be an IP address in use by another device.
By default, the router ID on a device is one of the following: