HP VPN Firewall Appliances Network Management Command Reference

368
Usage guidelines
RFC 1583 specifies a different method than RFC 2328 for selecting the best route from multiple AS
external routes destined for the same network. Using this command can make them compatible. If RFC
2328 is compatible with RFC 1583, the intra-area route in the backbone area is preferred, if not, the
intra-area route in the non-backbone area is preferred to reduce the burden of the backbone area.
Examples
# Disable compatibility with RFC 1583.
<Sysname> system-view
[Sysname] ospf 100
[Sysname-ospf-100] undo rfc1583 compatible
router id
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
Default command level
2: System level
Parameters
router-id: Specifies the router ID, in the form of a dotted decimal IPv4 address.
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 interface IP address is used as the router ID. If
no loopback interface IP address is available, the highest physical interface IP address is used,
regardless of the interface status (up or down).
During an active/standby switchover, the standby main processing unit (MPU) checks whether the
previously backed up router ID is valid. If not, it selects a new router ID.
Only when the interface IP address used as the router ID is removed or modified, a new router ID is
selected. Other events will not trigger a router ID re-selection. For example, router ID re-selection is not
triggered when the interface goes down, you change the router ID to the address of a loopback interface
after a physical interface address is selected as the router ID, or a higher interface IP address is
configured as the router ID.
After a router ID is changed, use the reset ospf process command to make it effective.