Filtering Ipv4 Is-Is Routes - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing
Procedure
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6.5.4 Filtering IPv4 IS-IS Routes

If some IS-IS routes are not preferred, configure conditions to filter IS-IS routes. Only IS-IS
routes meeting the specified conditions can be added to an IP routing table.
Context
Only routes in an IP routing table can be used to forward IP packets. An IS-IS route can take
effect only after this IS-IS route has been successfully added to an IP routing table.
If an IS-IS route does not need to be added to a routing table, specify conditions, such as a basic
ACL, IP prefix, and routing policy, to filter routes so that only IS-IS routes that meet the specified
conditions can added to an IP routing table. IS-IS routes that do not meet the specified conditions
cannot be added to the IP routing table and cannot be selected to forward IP packets.
Issue 01 (2012-03-15)
Configure equal-cost IS-IS routes to work in load-balancing mode.
1. Run:
system-view
The system view is displayed.
2. Run:
isis [ process-id ]
The IS-IS view is displayed.
3. Run:
maximum load-balancing number
The maximum number of load-balancing equal-cost IS-IS routes is set.
NOTE
If the number of IS-IS equal-cost routes is greater than the value of number, the number of IS-
IS equal-cost routes to work in load-balancing mode is determined by number. If the number
of IS-IS equal-cost routes is smaller than the value of number, IS-IS equal-cost routes of the
actual number work in load-balancing mode.
Configure preference values for equal-cost IS-IS routes.
1. Run:
system-view
The system view is displayed.
2. Run:
isis [ process-id ]
The IS-IS view is displayed.
3. Run:
nexthop ip-address weight value
A preference value is configured for an equal-cost IS-IS route.
NOTE
A larger value of the value parameter indicates a higher preference.
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