PLANET XGS3-24040 - Manual (Page 384)

29-97
be matched（ranging between 0～32）, “le” means less than or equal to, <max_prefix_len> is the
maximum length of prefix to be matched（ranging between 0～32）.
Default:
None.
Command Mode:
Global Mode
Usage Guide:
A prefix-list is identified by a prefix-list name. Each prefix-list may include several items each of
which independently specifies a matching scope of network prefix-list type which is identified with a
sequence-number. sequence-number specifies the sequence of matching check in the prefix-list. In
the matching process the switch check in turn every items identified by “sequence-number”
ascending. Once certain item obtains the conditions then the prefix-list filter is passed (without
proceeding into the next item check)
Attentions should be paid on that at least one item match mode should be “permit” when more than
one prefix-list items is defined. The deny mode items can be previously defined so to remove the
unsuitable routing messages fast. However if all items are at deny mode then none of the routes
would be able to pass the filter of this prefix-list. We here can define a “permit 0.0.0.0/0 ge 0 le 32”
item after several defined “deny mode” items so to grant the passage for all other routing messages.
Example:
Switch#config terminal
Switch(config)#ip prefix-list mylist seq 12345 deny 10.0.0.0/8 le 22 ge 14
29.3 ip prefix-list sequence-number
Command:
ip prefix-list sequence-number
no ip prefix-list sequence-number
Function:
Enable the sequence-number auto-creation function, the “no ip prefix-list sequence-number”
command close the prefix-list sequence-number.
Parameter:
None.
Default:
Sequence-number auto-creation enabled.
Command Mode:
Global Mode
Usage Guide:
The command can be used to close the prefix-list sequence-number.
Example:
Switch(config)#no ip prefix-list sequence-number