12-25
Parameters
ip-prefix-name
: IPv4 prefix list name, a string of 1 to 19 characters.
index-number
: Index number, in the range 1 to 65535, for uniquely specifying an item of the
IPv4 prefix list. An index with a smaller number is matched first.
deny
: Specifies the match mode for the IPv4 prefix list as
deny
. If a route matches the IPv4
prefix list, the route neither passes the filter nor matches against the next item; if not, the route
matches against the next item (suppose the IPv4 prefix list has multiple items configured).
permit
: Specifies the match mode for the IPv4 prefix list as
permit
. If a route matches the IPv4
prefix list, it passes the IPv4 prefix list. If not, it matches against the next item (suppose the
IPv4 prefix list has multiple items configured).
ip-address mask-length
: Specifies an IPv4 prefix and mask length. The
mask-length
is in the
range 0 to 32.
min-mask-length
,
max-mask-length
: Specifies the prefix range.
greater-equal
means “greater
than or equal to” and
less-equal
means “less than or equal to”. The range relation is
mask-length
<=
min-mask-length
<=
max-mask-length
<= 32. If only the
min-mask-length
is
specified, the prefix length range is [ min-mask-length, 32 ]. If only the
max-mask-length
is
specified, the prefix length range is [mask-length, max-mask-length ]. If both min-mask-length
and max-mask-length are specified, the prefix length range is [ min-mask-length,
max-mask-length ].
Description
Use the
ip ip-prefix
command to configure an IPv4 prefix list or an item of it.
Use the
undo ip ip-prefix
command to remove an IPv4 prefix list or an item of it.
No IPv4 prefix list is configured by default.
An IPv4 prefix list is used to filter IPv4 addresses. It may have multiple items, each of which
specifies a range of IPv4 prefixes. The relation between the items is logic OR, namely, if an
item is passed, the IPv4 prefix list is passed. If no item is passed, the IP prefix list cannot be
passed.
The IP prefix range is determined by
mask-length
and [
min-mask-length, max-mask-length
]. If
both
mask-length
and [
min-mask-length, max-mask-length
] are specified, the IP address must
satisfy both of them.
If both
ip-address
and
mask-length
are specified as 0.0.0.0 0, only the default route will be
matched.
To match all routes, use 0.0.0.0 0
less-equal
32.
Examples
# Define IP prefix list
p1
to permit routes matching network 10.0.192.0/8 and with mask length
17 or 18.
<Sysname> system-view
[Sysname] ip ip-prefix p1 permit 10.0.192.0 8 greater-equal 17 less-equal 18
reset ip ip-prefix
Syntax
reset ip ip-prefix
[
ip-prefix-name
]
