3Com Switch 4800G 24-Port Configuration Manual page 493

Creating a Routing
Policy
n
Defining if-match
Clauses for the Routing
Policy
Follow these steps to create a routing policy:
To do...
Enter system view
Create a routing policy and
enter its view
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.
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.
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.
Follow these steps to define if-match clauses for a route-policy:
To do...
Enter system view
Enter routing policy view
Match IPv6 routes having
the next hop or source
specified in the ACL or IP
prefix list
Match IPv6 BGP routes
having AS path attributes
specified in the AS path list
(s)
Match IPv6 BGP routes
having community attributes
in the specified community
list(s)
Match routes having the
specified cost
Match BGP routes having
extended attributes
contained in the extended
community list(s)
Match routes having
specified outbound
interface(s)
Use the command...
system-view
route-policy route-policy-name { permit |
deny } node node-number
Use the command...
system-view
route-policy route-policy-name
{ permit | deny } node
node-number
if-match ipv6 { address |
next-hop | route-source } { acl
acl-number | prefix-list
ipv6-prefix-name }
if-match as-path
as-path-number&<1-16>
if-match community
{ basic-community-list-number
[ whole-match ] |
adv-community-list-number }&<
1-16>
if-match cost value
if-match extcommunity
ext-comm-list-number&<1-16>
if-match interface
{ interface-type
interface-number }&<1-16>
Configuring a Routing Policy
Remarks
-
Required
Optional
Not configured by default
Optional
Not configured by default
Optional
Not configured by default
Optional
Not configured by default
Optional
Not configured by default
Optional
Not configured by default
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Remarks
-
Required