Operation Manual – IPv4 Routing
H3C S3610&S5510 Series Ethernet Switches
Chapter 6 Routing Policy Configuration
6-7
Note:
z
If a node has the
permit
keyword specified, routing information meeting the node’s
conditions will be handled using the
apply
clauses of this node, without needing to
match against the next node. If routing information does not meet the node’s
conditions, it will go to the next node for a match.
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If a node is specified as
deny
, the
apply
clauses of the node will not be executed.
When routing information matches all
if-match
clauses of the node, it can neither
pass the node, nor go to the next node. If route information cannot match any
if-match
clause of the node, it will go to the next node for a match.
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When a routing policy is defined with 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’s conditions cannot
pass the routing policy. If all nodes of the routing policy are set using the
deny
keyword, no routing information can pass it.
6.4.3 Defining if-match Clauses for the Routing Policy
Follow these steps to define if-match clauses for a route-policy:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter routing policy view
route-policy
route-policy-name
{
permit
|
deny
}
node
node-number
—
Match IPv4 routes
having
destinations
specified in the
ACL
if-match
acl acl-number
Match IPv4 routes
having
destinations
specified in the IP
prefix list
if-match ip-prefix
ip-prefix-name
Optional
Not configured
by default
Define match
criteria for IPv4
routes
Match IPv4 routes
having next hops
or sources
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
Match routes having AS path
attributes specified in the AS path list
(s)
if-match as-path
as-path-number
&<1-16>
Optional
Not configured
by default
