H3C Technologies H3C S7500E Series Switches - Manual (Page 24)

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z Select the router ID configured with the router id command;
z Select the highest IP address among the IP addresses of loopback interfaces as the router ID:
z If no loopback interface IP address is available, the highest IP address among the IP addresses of
physical interfaces is selected as the router ID (regardless of the interface state).
z If the interface whose IP address is the router ID is removed or modified, a new router ID is
selected. Other events, (the interface goes down; after a physical interface’s IP 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 router ID re-selection.
z A VPN instance selects a router ID among the IP addresses of interfaces belonging to it according
to the preceding procedure.
z When a master/backup switchover occurs, the backup device selects a router ID according to the
preceding procedure.
z After a router ID is changed, you need to use the reset command to make it effective.
Displaying and Maintaining a Routing Table
To do… Use the command… Remarks
Display brief information about the
active routes in the routing table
display ip routing-table [ vpn-instance
vpn-instance-name ] [ verbose | | { begin
| exclude | include } regular-expression ]
Available in any view
Display information about routes to
the specified destination
display ip routing-table ip-address
[ mask-length | mask ] [ longer-match ]
[ verbose ]
Available in any view
Display information about routes
with destination addresses in the
specified range
display ip routing-table ip-address1
{ mask-length | mask } ip-address2
{ mask-length | mask } [ verbose ]
Available in any view
Display information about routes
permitted by an IPv4 basic ACL
display ip routing-table acl acl-number
[ verbose ]
Available in any view
Display routing information
permitted by an IPv4 prefix list
display ip routing-table ip-prefix
ip-prefix-name [ verbose ]
Available in any view
Display routes of a routing protocol
display ip routing-table protocol
protocol [ inactive | verbose ]
Available in any view
Display statistics about the
network routing table or a VPN
routing table
display ip routing-table [ vpn-instance
vpn-instance-name ] statistics
Available in any view
Display the router ID display router id Available in any view