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122 CHAPTER 5: IP ROUTING PROTOCOL OPERATION
Protocol specifies the routing protocol sources for distributing routes, which can
be direct, static, rip, bgp, ospf, or ospf-ase.
For more information, see “Configuring for Filtering Received Routes” and
“Configuring for Filtering Distributed Routes ”.
Setting the Preference of the IS-IS Protocol
In a router where several routing protocols are concurrently operating, there is an
issue of sharing and selecting the routing information among all the routing
protocols. The system sets a preference for each routing protocol. When various
routing protocols find the route to the same destination, the route learned by the
protocol with the higher preference will take effect.
Perform the following configurations in IS-IS view..
By default, the preference of IS-IS routes is 15.
Resetting All the IS-IS Data Structures
When it is necessary to refresh some LSPs immediately, perform the following
configuration in user view. This may be necessary if you change area or domain
authentication parameters.
Resetting the Specified IS-IS Peer
When it is necessary to reset peer relationships, perform the following
configuration in user view..
Displaying and Debugging IS-IS
Using the following configuration operations, you can view the IS-IS LSDB , the
transmission/receipt of IS-IS packets, IS-IS configuration, and information related
to the IS-IS SFP calculation and IS-IS route table.
Table 85 Configuring the Preference of IS-IS Protocol
Operation Command
Configure the preference of IS-IS protocol preference value
Restore the default preference of IS-IS
protocol
undo preference
Table 86 Resetting all the IS-IS Data Structures
Operation Command
Reset the IS-IS data structure reset isis all
Table 87 Resetting the Specified IS-IS Peer
Operation Command
Reset the specified IS-IS peer reset isis peer system-id