Brocade BigIron RX Series Configuration Guide - Manual (Page 1038)

960 BigIron RX Series Configuration Guide
53-1002484-04
Configuring IPv4 address family route parameters
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BigIron RX(config)# route-map default_level1 permit 1
BigIron RX(config-routemap default_level1)# set level level-1
BigIron RX(config-routemap default_level1)# exit
BigIron RX(config)# router isis
BigIron RX(config-isis-router)# address-family ipv4 unicast
BigIron RX(config-isis-router-ipv4u)# default-information-originate route-map
default_level1
These commands configure a route map to set the default advertisement level to Level 1 only.
Syntax: [no] route-map <map-name> permit | deny <sequence-number>
Syntax: [no] set level level-1 | level-1-2 | level-2
For this use of a route map, use the permit option and do not specify a match statement. Specify a
set statement to set the level to one of the following:
• level-1 – Level 1 only.
• level-1-2 – Level 1 and Level 2.
• level-2 – Level 2 only (default).
Changing the administrative distance for IPv4 IS-IS
When the 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 router 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 router 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 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 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.
BigIron RX(config-isis-router-ipv4u)# distance 100
Syntax: [no] distance <number>