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The following example shows how
a prefix list denies the default route 0.0.0.0/0:
ip prefix-list abc deny 0.0.0.0/0
The following example shows how
a prefix list permits a route that matches the prefix 35.0.0.0/8:
ip prefix-list abc permit 35.0.0.0/8
The following example shows how
to configure the BGP process so that it only accept prefixes with a prefix
length of /8 to /24:
router bgp
version 2
network 101.20.20.0
distribute-list prefix max24 in
!
ip prefix-list max24 seq 5 permit 0.0.0.0/0 ge 8 le 24 !
The example in the Figure
shows how to configure Router
A with a prefix list so that it can send only 172.0.0.0/8 update to AS 65000,
not 172.30.0.0/16.
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Lab
Activity |
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In
this lab, you will learn how to use a prefix list to
filter routes. |
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