Defining if-match clauses – H3C Technologies H3C SR8800 User Manual
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Step Command
2.
Create a routing policy,
specify a node for it and enter
routing policy view.
route-policy route-policy-name { deny | permit } node node-number
NOTE:
•
If a routing policy node has the permit keyword specified, routing information matching all the if-match
clauses of the node will be handled using the apply clauses of this node, without needing to match
against the next node. If routing information does not match the node, it will go to the next node for a
match.
•
If a routing policy node has the deny keyword specified, the apply clauses of the node will not be
executed. When routing information matches all the if-match clauses of the node, it cannot pass the
node, or go to the next node. If route information cannot match all the if-match clauses of the node, it
will go to the next node for a match.
•
When a routing policy has more than one node, at least one node should be configured with the permit
keyword. If the routing policy is used to filter routing information, routing information that does not meet
any node cannot pass the routing policy. If all nodes of the routing policy are set with the deny keyword,
no routing information can pass it.
Defining if-match clauses
To define if-match clauses for a routing policy:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter routing policy view.
route-policy route-policy-name { deny | permit }
node node-number
N/A
3.
Define match criteria for IPv4
routes.
•
Match IPv4 routing information specified in
the ACL:
if-match acl acl-number
•
Match IPv4 routing information specified in
the IP prefix list:
if-match ip-prefix ip-prefix-name.
•
Match IPv4 routing information whose next
hop or source is specified in the ACL or IP
prefix list:
if-match ip { next-hop | route-source } { acl
acl-number | ip-prefix ip-prefix-name }
Optional
Not configured by
default
4.
Match IPv6 routing
information whose next hop or
source is specified in the ACL
or IP prefix list.
if-match ipv6 { address | next-hop |
route-source } { acl acl-number | prefix-list
ipv6-prefix-name }
Optional
Not configured by
default
5.
Match BGP routing
information whose AS path
attribute is specified in the AS
path list (s).
if-match as-path AS-PATH-number&<1-16>
Optional
Not configured by
default