Dell BigIron RX Series, Configuration Manual

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806 BigIron RX Series Configuration Guide
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The <acl> parameter specifies the name of a community list ACL. You can specify up to five ACLs.
Separate the ACL names or IDs with spaces.
Here is another example.
These commands configure an additional community ACL, std_2, that contains community
numbers 23:45 and 57:68. Route map bgp3 compares each BGP4 route against the sets of
communities in ACLs std_1 and std_2. A BGP4 route that contains
either but not both sets of
communities matches the route map. For example, a route containing communities 23:45 and
57:68 matches. However, a route containing communities 23:45, 57:68 and 12:34, or
communities 23:45, 57:68, 12:34, and no-export does not match. To match, the route’s
communities must be the same as those in exactly one of the community ACLs used by the match
community statement.
Setting parameters in the routes
Use the following command to define a set statement that prepends an AS number to the AS path
on each route that matches the corresponding match statement.
BigIron RX(config-routemap GET_ONE)# set as-path prepend 65535
Syntax: set
[as-path [prepend <as-num,as-num,...> ]] |
[automatic-tag] |
[comm-list
<acl> delete] |
[community <num>:<num> | <num> | internet | local-as | no-advertise | no-export] |
[dampening [ <half-life> <reuse> <suppress> <max-suppress-time> ]]
[ip next hop <ip-addr> ]
[ip next-hop peer-address] |
[local-preference
<num> ] |
[metric [+ | - ] <num> | none] |
[metric-type type-1 | type-2] | external
[metric-type internal] |
[next-hop
<ip-addr> ] |
[origin igp | incomplete] |
[tag
<tag-value> ] |
[weight <num> ]
The as-path prepend <num,num,...> parameter adds the specified AS numbers to the front of the
AS-path list for the route.
The automatic-tag parameter calculates and sets an automatic tag value for the route.
NOTE
This parameter applies only to routes redistributed into OSPF.
The comm-list parameter deletes a community from a BGP4 route’s community attributes field.
The community parameter sets the community attribute for the route to the number or well-known
type you specify.
BigIron RX(config)# ip community-list standard std_2 permit 23:45 56:78
BigIron RX(config)# route-map bgp3 permit 1
BigIron RX(config-routemap bgp3)# match community std_1 std_2 exact-match