Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 297)

Multi-Service IronWare Routing Configuration Guide 269
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Configuring IPv4 address family route parameters
Matching based on IS-IS protocol type
The match option has been added to the route-map command that allows IS-IS routes to be
matched based on level-1 or level-2 or all IS-IS routes.
Brocade(config-routemap test)# match protocol isis level-1
Syntax: [no] match protocol isis {level-1|level-2}
The match protocol isis level-1 option can be used to match the IS-IS Level-1 routes.
The match protocol isis level-2 option can be used to match the IS-IS Level-2 routes.
Changing the administrative distance for IPv4 IS-IS
When the Brocade device has paths from multiple routing protocols to the same destination, it
compares the administrative distances of the paths and selects the path with the lowest
administrative distance to place in the IPv4 route table.
For example, if the Brocade device has a path from RIP, from OSPF, and IPv4 IS-IS to the same
destination, and all the paths are using their protocols’ default administrative distances, the device
selects the OSPF path, because that path has a lower administrative distance than the RIP and
IPv4 IS-IS paths.
Here are the default IPv4 administrative distances on the Brocade device:
• Directly connected – 0 (this value is not configurable)
• Static – 1 (applies to all static routes, including default routes)
• EBGP – 20
• OSPF – 110
• IPv4 IS-IS – 115
• RIP – 120
• IBGP – 200
• Local BGP – 200
• Unknown – 255 (the device will not use this route)
Lower administrative distances are preferred over higher distances. For example, if the Brocade
device receives routes for the same network from IPv4 IS-IS and from RIP, it will prefer the IPv4 IS-IS
route by default.
To change the administrative distance for IPv4 IS-IS routes, enter the following command at the
IPv4 IS-IS unicast address family configuration level.
Brocade(config-isis-router-ipv4u)# distance 100
Syntax: [no] distance number
This command changes the administrative distance for all IPv4 IS-IS routes to 100.
The number parameter specifies the administrative distance. You can specify a value from 1 –
255. (Routes with a distance value of 255 are not installed in the routing table.) The default for
IPv4 IS-IS is 115.