Dell BigIron RX Series, Руководство по настройке

Страница: 876 / 1458

800 BigIron RX Series Configuration Guide
53-1002253-01
Filtering
26
The seq <seq-value> parameter is optional and specifies the IP prefix list’s sequence number. If
you do not specify a sequence number, the software numbers them in increments of 5, beginning
with prefix list entry 5. The software interprets the prefix list entries in numerical order, beginning
with the lowest sequence number.
The deny | permit parameter specifies the action the software takes if a neighbor’s route is in this
prefix list.
The prefix-list matches only on this network unless you use the ge <ge-value> or le <le-value>
parameters. (See below.)
The <network-addr> / <mask-bits> parameter specifies the network number and the number of bits
in the network mask.
You can specify a range of prefix length for prefixes that are more specific than
<network-addr> / <mask-bits> .
•
If you specify only ge <ge-value> , then the mask-length range is from <ge-value> to 32.
•
If you specify only le <le-value> , then the mask-length range is from length to <le-value> .
The <ge-value> or <le-value> you specify must meet the following condition.
length < ge-value <= le-value <= 32
If you do not specify ge <ge-value> or le <le-value> , the prefix list matches only on the exact
network prefix you specify with the <network-addr> / <mask-bits> parameter.
For the syntax of the neighbor command shown in the example above, refer to “Configuring BGP4
neighbors” on page 771 and “Configuring a BGP4 peer group” on page 778.
Defining neighbor distribute lists
A neighbor distribute list is a list of BGP4 address filters or ACLs that filter the traffic to or from a
neighbor.
To configure a distribute list that uses ACL 1, enter a command such as the following.
BigIron RX(config-bgp)# neighbor 10.10.10.1 distribute-list 1 in
This command configures the device to use ACL 1 to select the routes that the device will accept
from neighbor 10.10.10.1.
Syntax: neighbor <ip-addr> distribute-list <name-or-num> in | out
The <ip-addr> parameter specifies the neighbor.
The <name-or-num> parameter specifies the name or number of a standard, extended, or named
ACL.
The in | out parameter specifies whether the distribute list applies to inbound or outbound routes.
•
in – controls the routes the device will accept from the neighbor.
•
out – controls the routes sent to the neighbor.