R21xx-HP FlexFabric 11900 Layer 3 IP Routing Command Reference

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Usage guidelines
To validate a newly configured route selection policy, you must use this command to reset BGP sessions.
BGP re-establishes the BGP sessions, advertises routes, and applies the new policy to routes. This
operation breaks down BGP sessions for a short while.
Examples
# Reset all BGP sessions for IPv6 unicast address family for the public network.
<Sysname> reset bgp all ipv6
router id (system view)
Use router id to configure a global router ID.
Use undo router id to remove the global router ID.
Syntax
router id router-id
undo router id
Default
No global router ID is configured.
Views
System view
Predefined user roles
network-admin
Parameters
router-id: Specifies a router ID in IP address format.
Usage guidelines
Some routing protocols use a router ID to identify a device. You can configure a global router ID, which
is used by routing protocols that have no router ID configured.
If no global router ID is configured, the highest loopback address, if any, is used as the router ID. If no
loopback address is available, the highest physical interface IP address is used, regardless of the
interface status.
If the device has active and standby MPUs, it backs up the configured or selected router ID. After an
active/standby switchover, the device checks whether the router ID is still effective. If it is not effective, the
device re-selects a router ID.
If the interface IP address that is selected as the router ID is removed or modified, a new router ID is
selected. Other events, (the interface goes down; after a physical interface address is selected as the
router ID, an IP address is configured for a loopback interface; a higher interface IP address is
configured) will not trigger a router ID re-selection.
After a router ID is changed, use the reset command to make it effective.
Examples
# C o n f i g u re a g l o b a l r o u t e r I D a s 1.1.1.1.
<Sysname> system-view
[Sysname] router id 1.1.1.1