Ipv6 Lisp Shortest-Eid-Prefix-Length - Cisco Nexus 7000 Series Command Reference Manual

Cisco Nexus 7000 Series LISP Commands
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m .

ipv6 lisp shortest-eid-prefix-length

To configure the shortest IPv6 endpoint identifier (EID)-prefix mask-length that is acceptable to an
ingress tunnel router (ITR) or Proxy ITR (PITR) in a received Map-Reply message or to an ETR in the
mapping-data record of a received Map-Request, use the ipv6 lisp shortest-eid-prefix-length
command. To return to the default configuration, use the no form of this command.
IPv6-EID-prefix-length Shortest IPv6 EID prefix-length accepted from a Map-Reply or data record
Syntax Description
48
Defaults
Global configuration mode
Command Modes
network-admin
Supported User Roles
vdc-admin
Command History Release
5.0(1.13)
When an ITR or PITR receives a Map-Reply message, the mapping data it contains includes the EID
Usage Guidelines
mask-length for the returned EID prefix. By default, the shortest EID prefix mask length accepted by an
ITR or PITR for an IPv4 EID prefix is a /48.
You can use the ipv6 lisp shortest-eid-prefix-length command to change this default. For example, it
might be necessary for a PITR to accept a shorter (coarser) prefix if one exists.
When an ETR receives a Map-Request message, it might contain a mapping data record that the ETR
can cache and possible use to forward traffic depending on the configuration of the ipv6 lisp etr
accept-map-request-mapping command.
Use the ipv6 lisp shortest-eid-prefix-length command to change the shortest prefix length accepted by
the ETR. In this case, the check for the shortest EID-prefix mask length is done prior to the verifying
Map-Request, if also configured. That is, if the EID-prefix mask length is less than the configured value,
the verifying Map-Request is not sent and the mapping data is not accepted.
This example shows how to configure the NX-OS device to accept a minimum IPv6 EID-prefix length:
Examples
switch# configuration terminal
switch(config)# ipv6 lisp shortest-eid-prefix-length 40
OL-25345-01
ipv6 lisp shortest-eid-prefix-length IPv6-EID-prefix-length
no ipv6 lisp shortest-eid-prefix-length IPv6-EID-prefix-length
in a Map-Request. The range is from 0 to 128.
Modification
This command was introduced.
Cisco Nexus 7000 Series NX-OS LISP Command Reference
ipv6 lisp shortest-eid-prefix-length
LSP-121