Filtering Ospfv3 Routes - Dell PowerConnect B-RX Configuration Manual

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Configuring OSPFv3
You must specify the <prefix-length> parameter as a decimal value. A slash mark (/) must follow
the <ipv6-prefix> parameter and precede the <prefix-length> parameter.

Filtering OSPFv3 routes

You can filter the routes to be placed in the OSPFv3 route table by configuring distribution lists.
OSPFv3 distribution lists can be applied globally or to an interface.
The functionality of OSPFv3 distribution lists is similar to that of OSPFv2 distribution lists. However,
unlike OSPFv2 distribution lists, which filter routes based on criteria specified in an Access Control
List (ACL), OSPFv3 distribution lists can filter routes using information specified in an IPv6 prefix list
or a route map.
Configuration examples
The following sections show examples of filtering OSPFv3 routes using prefix lists globally and for a
specific interface, as well as filtering OSPFv3 routes using a route map.
You can configure the device to use all three types of filtering. When you do this, filtering using
route maps has higher priority over filtering using global prefix lists. Filtering using prefix lists for a
specific interface has lower priority than the other two filtering methods.
The example in this section assume the following routes are in the OSPFv3 route table.
BigIron RX# show ipv6 ospf route
Current Route count: 5
*IA 3001::/64
*E2 3010::/64
*IA 3015::/64
*IA 3020::/64
*E2 6001:5000::/64
Configuring an OSPFv3 distribution list using an IPv6 prefix list as input
The following example illustrates how to use an IPv6 prefix list is used to filter OSPFv3 routes.
To specify an IPv6 prefix list called filterOspfRoutes that denies route 3010::/64, enter the following
commands.
BigIron RX(config)# ipv6 prefix-list
BigIron RX(config)# ipv6 prefix-list
128
Syntax: ipv6 prefix-list <name> [seq <seq-value>] [description <string>] deny | permit
To configure a distribution list that applies the filterOspfRoutes prefix list globally.
1220
Intra: 3 Inter: 0 External: 2 (Type1 0/Type2 2)
Equal-cost multi-path: 0
Destination
Next Hop Router
::
fe80::2e0:52ff:fe00:10
fe80::2e0:52ff:fe00:10
::
fe80::2e0:52ff:fe00:10
<ipv6-addr>/<mask-bits> [ge <ge-value>] [le <le-value>]
Options Area
Outgoing Interface
--------- 0.0.0.1
ve 10
--------- 0.0.0.0
ve 10
V6E---R-- 0.0.0.0
ve 10
--------- 0.0.0.0
ve 11
--------- 0.0.0.0
ve 10
filterOspfRoutes seq 5 deny 3010::/64
filterOspfRoutes seq 7 permit ::/0 ge 1 le
BigIron RX Series Configuration Guide
Cost Type2 Cost
0 0
10 0
11 0
10 0
10 0
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