Configuring Principles For Using Equal-Cost Ipv6 Is-Is Routes - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
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7.13.3 Configuring Principles for Using Equal-Cost IPv6 IS-IS
Routes
If multiple equal-cost IS-IS routes are available on a network, configure the equal-cost IS-IS
routes to work in load-balancing mode to increase the bandwidth usage of each link.
Context
If there are redundant IPv6 IS-IS links, multiple routes may have an equal cost. Configure the
equal-cost IPv6 IS-IS routes to work in load-balancing mode so that traffic will be evenly
balanced among these links.
This mechanism increases the link bandwidth usage and prevents network congestion caused
by link overload. However, this mechanism may make traffic management more difficult
because traffic will be randomly forwarded.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
isis [ process-id ]
The IS-IS view is displayed.
Issue 02 (2014-09-30)
unwanted routes. Then, configure another rule with a larger number in
the same ACL and specify the action permit in this rule to receive or
advertise the other routes.
Route filtering using a whitelist: Configure a rule with a smaller
number and specify the action permit in this rule to permit the routes
to be received or advertised by the system. Then, configure another
rule with a larger number in the same ACL and specify the action
deny in this rule to filter out unwanted routes.
– ipv6 import-route isis level-1 into level-2 [ tag tag | filter-policy ipv6-prefix
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ipv6-prefix-name ]
Routes that meet the specified conditions in Level-1 areas are leaked into the
Level-2 area based on the prefix list.
– ipv6 import-route isis level-1 into level-2 [ tag tag | filter-policy route-policy
route-policy-name ]
Routes that meet the specified conditions in Level-1 areas are leaked into the
Level-2 area based on the route policy.
NOTE
The command is run on the Level-1-2 device that is connected to an external area.
By default, all routes in a Level-1 area are leaked into the Level-2 area. After this command is
run, only routes that meet the specified conditions can be leaked into the Level-2 area.
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