Cisco Nexus 7000 Series Command Reference Manual page 151

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 .
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You can enable multiple algorithms concurrently, subject to the dependencies listed above with each
algorithm.
You can view the status associated with each locator reachability algorithm by using the show ip lisp
map-cache or show ipv6 lisp map-cache commands.
This command does not require a license.
This example shows how to configure the locator reachability algorithm rloc-probing functionality on a
Examples
Cisco NX-OS device:
switch# configuration terminal
switch(config)# lisp loc-reach-algorithm rloc-probing
Related Commands Command
ip lisp etr
ip lisp itr
ipv6 lisp etr
ipv6 lisp itr
show ip lisp map-cache Displays the current dynamic and static IPv4 EID-to-RLOC map-cache
show ipv6 lisp
map-cache
OL-25345-01
The echo-nonce algorithm works only when traffic is flowing in both directions between locators.
You must enable the echo-nonce algorithm on both an ITR and ETR to have it operate correctly. You
must not use the echo-nonce algorithm on a PITR because the echo-nonce algorithm requires
bidirectional traffic flows between locators and encapsulated traffic is not returned to the PITR.
When you configure echo-nonce, every 1 minute, an ITR requests that the nonce it is using in
encapsulated packets be echoed back from the locator it is using. If data is still arriving from the
locator but the nonce is not being echoed, the ITR assumes that the forward path is unreachable; the
locator is marked to the down status and a switchover is made to another locator if one is available.
After 3 minutes and if data is arriving from the locator, the ITR marks the locator up and starts
sending nonce requests again.
The rloc-probing algorithm works in most environments. The rloc-probing algorithm can be used
on ITR, ETR, and PITR devices. When you configure the rloc-probing algorithm, the ITR sends a
Map-Request to an ETR with the Probe-bit set. This action solicits a Map-Reply with the Probe-bit
from the ETR. Use the rloc-probing algorithm only when the tcp-count and echo-nonce cannot
determine the up and down status of the forwarding path. This algorithm is particularly useful for
unidirectional traffic flows between two sites. In this case, an ETR that receives a Map-Request
rloc-probe from an ITR can use the mapping data if supplied and if the ETR has
accept-map-request-data configured. An ITR that receives a Map-Reply rloc-probe from an ETR
can use the mapping data from the ETR's site for fast mapping data updates.
Description
Configures the Cisco NX-OS device to act as an IPv4 LISP Egress Tunnel
Router (ETR).
Configures the Cisco NX-OS device to act as an IPv4 LISP Ingress Tunnel
Router (ITR).
Configures the Cisco NX-OS device to act as an IPv6 LISP Egress Tunnel
Router (ETR).
Configures the Cisco NX-OS device to act as an IPv6 LISP Ingress Tunnel
Router (ITR).
entries.
Displays the current dynamic and static IPv6 EID-to-RLOC map-cache
entries.
Cisco Nexus 7000 Series NX-OS LISP Command Reference
lisp loc-reach-algorithm
LSP-141