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IP Routing Policy Configuration Commands 171
index_number Identify an item in the prefix address list. The item with smaller
index-number will be tested first.
permit Enter to specify the match mode of the defined address prefix list items as
permit mode.
deny Enter to specify the match mode of the defined address prefix list items as
deny mode.
network Enter the IP address prefix range (IP address). If it is 0.0.0.0 0, all the IP
addresses are matched.
len Enter the IP address prefix range (mask length). If it is 0.0.0.0 0, all the IP
addresses are matched.
greater_equal, less_equal The address prefix range [greater-equal, less-equal]
to be matched after the address prefix network len has been matched. The
meaning of
greater-equal is "larger than or equal to" , and the meaning of
less-equal is "less than or equal to". The range is len <= greater-equal <=
less-equal <= 32. When only
greater-equal is used, it denotes the prefix range
[greater-equal, 32]. When only
less-equal is used, it denotes the prefix range
[len, less-equal].
Description
Use the ip ip-prefix command to configure an address prefix list or one of its
items.
Use the undo ip ip-prefix command to delete an address prefix list or one of its
items.
By default, there’s no address prefix list.
The address prefix list is used for IP address filtering. An address prefix list may
contain several items, and each item specifies one address prefix range. The
inter-item filtering relation is "OR", i.e. passing an item means passing the filtering
of this address prefix list. Not passing the filtering of any item means not passing
the filtration of this prefix address list.
The address prefix range may contain two parts, which are determined by len and
[
greater-equal, less-equal] respectively. If the prefix ranges of these two parts
are both specified, the IP to be filtered must match the prefix ranges of these two
parts.
If you specify network len as 0.0.0.0 0, it only matches the default route.
Example
The prefix address list of this address indicates to match the bits 1 to 8 and the bits
17 to 18 for filtering the IP address with the bits 1 to 8 and the bits 17 to 18 of the
specified IP network segment 10.0.192.0.
<4500>system-view
System View: return to User View with Ctrl+Z.
[4500]ip ip-prefix p1 permit 10.0.192.0 8 greater-equal 17
less-equal 18