Dell Force10 Z9000 Configuration Manual page 110
Ftos configuration guide for z9000 system
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- Reference manual (1483 pages) ,
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If you want to forward all routes that do not match the prefix list criteria, you must configure a prefix list
filter to permit all routes (
prefix list. To permit the default route only, enter
Figure 6-13
In the example, filter 20 was configured before filter 15 and 12, but the
the filters in the correct order.
Figure 6-13. Command Example: seq
FTOS(conf-nprefixl)#seq 20 permit 0.0.0.0/0 le 32
FTOS(conf-nprefixl)#seq 12 deny 134.23.0.0 /16
FTOS(conf-nprefixl)#seq 15 deny 120.23.14.0 /8 le 16
FTOS(conf-nprefixl)#show config
!
ip prefix-list juba
seq 12 deny 134.23.0.0/16
seq 15 deny 120.0.0.0/8 le 16
seq 20 permit 0.0.0.0/0 le 32
FTOS(conf-nprefixl)#
Note the last line in the prefix list Juba contains a "permit all" statement. By including this line in a prefix
list, you specify that all routes not matching any criteria in the prefix list are forwarded.
To delete a filter, use the
If you are creating a standard prefix list with only one or two filters, you can let FTOS assign a sequence
number based on the order in which the filters are configured. The FTOS assigns filters in multiples of
five.
To configure a filter without a specified sequence number, use these commands in the following sequence
starting in the CONFIGURATION mode:
Step
Command Syntax
ip prefix-list prefix-name
1
{ deny | permit } ip-prefix [ ge
2
min-prefix-length] [ le
max-prefix-length]
Figure 6-14
filters were assigned sequence numbers based on the order in which they were configured (for example,
the first filter was given the lowest sequence number). The
mode displays the two filters with the sequence numbers 5 and 10.
|
Access Control Lists (ACLs)
110
permit 0.0.0.0/0 le 32
illustrates how the
command orders the filters according to the sequence number assigned.
seq
no seq sequence-number
Command Mode
CONFIGURATION
CONFIG-NPREFIXL
illustrates a prefix list in which the sequence numbers were assigned by the software. The
). The "permit all" filter should be the last filter in your
.
permit 0.0.0.0/0
show config
command in the PREFIX LIST mode.
Purpose
Create a prefix list and assign it a unique name.
Create a prefix list filter with a deny or permit
action. The optional parameters are:
ge min-prefix-length: is the minimum
•
prefix length to be matched (0 to 32).
le max-prefix-length: is the maximum
•
prefix length to be matched (0 to 32).
show config
command displays
command in the PREFIX LIST
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