Specifications

Chapter 5. IBM System Networking RackSwitch implementation 221
򐂰 Run neighbor <peer number> route-origination-interval <1-65535> at the BGP level
to set the minimum time between route originations, in seconds. The default value is
15 seconds.
򐂰 Run neighbor <peer number> time-to-live <1-255> at the BGP level to configure the
TTL value for a specified peer.
Time-to-live (TTL) is a value in an IP packet that tells a network router whether the packet
has been in the network too long and should be discarded. TTL specifies a certain time
span in seconds that, when exhausted, causes the packet to be discarded. The TTL is
determined by the number of router hops the packet is allowed before it must
be discarded.
This command specifies the number of router hops that the IP packet can make. This
value is used to restrict the number of “hops” the advertisement makes. It is also used to
support multi-hops, which allow BGP peers to talk across a routed network. The default
number is set at 1.
򐂰 Run [no] neighbor <peer number> route-map in <1-32> at the BGP level to add/remove
a route map into the in-route map list.
򐂰 Run [no] neighbor <peer number> route-map out <1-32> at the BGP level to
add/remove a route map into an out-route map list.
򐂰 Run [no] neighbor <peer number> shutdown at the BGP level to enable or disable
peer configuration.
򐂰 Run no neighbor <peer number> at the BGP level to delete a peer configuration.
򐂰 Run [no] neighbor <peer number> password <1-16 characters> to configure a BGP
peer password.
򐂰 Run [no] neighbor <peer number> passive at the BGP level to enable or disable BGP
passive mode, which prevents the switch from initiating BGP connections with peers.
Instead, the switch waits for the peer to send an open message first.
򐂰 Run show ip bgp neighbor [<peer number>] at the BGP level to display the current BGP
peer configuration.
BGP redistribution configuration
Run the following commands to set the BGP redistribution configuration:
򐂰 Run [no] neighbor <peer number> redistribute default-metric <1-4294967294> at the
BGP level to set the default metric of the advertised routes.
򐂰 Run [no] neighbor <peer number> redistribute default-action
{import|originate|redistribute} at the BGP level to set the default route action.
Defaults routes can be configured as import, originate, redistribute, or none.
– Import: Import these routes.
– Originate: The switch sends a default route to peers if it does not have any default
routes in its routing table.
Important: The TTL value is significant only to eBGP peers; for iBGP peers, the TTL
value in the IP packets is always 255 (regardless of the configured value).