3Com MSR 50 Series, Руководство по настройке

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998 C
HAPTER
60: R
OUTING
P
OLICY
C
ONFIGURATION
n
■
The if-match clauses of a route-policy are in logic AND relationship, namely,
routing information has to satisfy all if-match clauses before being executed
with apply clauses.
■
You can specify no or multiple if-match clauses for a routing policy. If no
if-match clause is specified, and the routing policy is in permit mode, all
routing information can pass the node; if in deny mode, no routing
information can pass.
■
A routing policy should use a non VPN ACL for filtering.
■
The differences between defining if-match clauses for IPv4 and IPv6 routing
policies are commands for matching the destination, next hop and source
address.
Defining apply Clauses
for the Routing Policy
To define apply clauses for a route-policy, use the following command:
Match routes having the specified route type if-match
route-type
{ internal |
external - type1 |
external-type2 |
external-type1or2 |
is-is-level-1 |
is-is-level-2 |
nssa-external-type
1
|
nssa-external-type
2
|
nssa-external-type
1or2
} *
Optional
Not configured by
default
Match RIP, OSPF, or IS-IS routes having the
specified tag value if-match tag value Optional
Not configured by
default
To do...
Use the
command... Remarks
To do... Use the command... Remarks
Enter system view system-view -
Create a routing policy and
enter its view route-policy
route-policy-name { permit |
deny } node node-number
Required
Not created by default
Set AS_Path attribute for BGP
routes apply as-path
as-number &<1-10>
[ replace ]
Optional
Not set by default
Delete community attributes of
BGP routing information
according to the community list apply comm-list
comm-list-number delete
Optional
Not configured by default
Set community attribute for
BGP routes apply community { none |
additive |
{ community-number &<1-16
> | aa:nn &<1-16> | internet
| no-export-subconfed |
no-export | no-advertise }
* [ additive ] }
Optional
Not set by default
Set a cost for routes apply cost [ + | - ] value Optional
Not set by default