441
Examples
# Configure node 10 of routing policy
policy1
to match IPv4 routing information whose next hop matches
IP prefix list
p1
.
<Sysname> system-view
[Sysname] route-policy policy1 permit node 10
[Sysname-route-policy-policy1-10] if-match ip next-hop prefix-list p1
ip prefix-list
Use
ip prefix-list
to configure an IPv4 prefix list or an item for the list.
Use
undo ip prefix-list
to remove an IPv4 prefix list or an item of it.
Syntax
ip prefix-list
prefix-list-name
[
index
index-number
] {
deny
|
permit
}
ip-address mask-length
[
greater-equal
min-mask-length
] [
less-equal
max-mask-length
]
undo ip prefix-list
prefix-list-name
[
index
index-number
]
Default
No IPv4 prefix list is configured.
Views
System view
Predefined user roles
network-admin
Parameters
prefix-list-name
: Specifies a name for the IPv4 prefix list, a case-sensitive string of 1 to 63 characters.
index-number
: Specifies an index number for an IPv4 prefix list item, in the range of 1 to 65535. An item
with a smaller number is matched first.
deny
: Specifies the deny mode. If a route matches the item, the route is denied without matching against
the next item; if not, the route matches against the next item (suppose the IPv4 prefix list has multiple
items).
permit
: Specifies the permit mode. If a route matches the item, it passes the IPv4 prefix list. If not, it
matches against the next item (suppose the IPv4 prefix list has multiple items).
ip-address mask-length
: Specifies an IPv4 prefix and mask length. The value range for the
mask-length
argument is 0 to 32.
min-mask-length
,
max-mask-length
: Specifies a prefix length range. The
greater-equal
keyword means
"greater than or equal to" and the
less-equal
keyword 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
].
Usage guidelines
An IPv4 prefix list is used to filter IPv4 addresses. It can contain multiple items, each of which specifies a
range of IPv4 prefixes. The relation between the items is logic OR. If an item is passed, the IPv4 prefix list
is passed. If no item is passed, the IP prefix list cannot be passed.
