Layer 3 Routing Commands 1306
network (IPv6 Address Family Configuration)
In IPv6 address family configuration mode, the network command identifies
network IPv6 prefixes that BGP originates in route advertisements to its
neighbors.
Syntax
network prefix mask network-mask [ route-map rm-name ]
no network prefix mask network-mask [ route-map rm-name ]
network ipv6-prefix/prefix-length [ route-map rm-name ]
no network ipv6-prefix/prefix-length
• prefix—An IPv4 address prefix in dotted decimal notation.
• network-mask—The network mask for the prefix in dotted-quad notation
(e.g., 255.255.0.0) where a zero bit in the mask indicates a don’t care
condition for the corresponding address bits.
• ipv6-prefix—An IPv6 network prefix. This argument must be in the form
documented in RFC 2373 where the address is specified in hexadecimal
using 16-bit values between 0x00 and 0xff and separated by colons.
• prefix-length—The length of the IPv6 prefix given as part of the ipv6-
prefix. Required if a prefix is specified. A decimal value in the range 1 to
128 that indicates how many of the high-order contiguous bits of the
address comprise the prefix (the network portion of the address) in /length
format. A slash mark must precede the decimal value in /length format.
• rm-name—The name of a route map used to filter prefixes or set
attributes of prefixes advertised by this network. The route map
statements are evaluated in order, and the first match terminates
processing of the route map. If the specified route map does not exist, the
network prefix is not advertised (all routes are denied).
Default Configuration
No networks are advertised by default.
Command Mode
IPv6 Address Family Configuration
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