Lisp Loc-Reach-Algorithm - Cisco Nexus 7000 Series Command Reference Manual

lisp loc-reach-algorithm

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 .
lisp loc-reach-algorithm
To configure a Locator/ID Separation Protocol (LISP) locator reachability algorithm, use the lisp
loc-reach-algorithm command. To disable this functionality, use the no form of this command.
Syntax Description
count-tcp
echo-nonce
rloc-probing
Disabled
Defaults
Global configuration mode
Command Modes
network-admin
Supported User Roles
vdc-admin
Command History Release
5.0(1.13)
Use the lisp loc-reach-algorithm command to enable or disable the selected LISP locator reachability
Usage Guidelines
algorithms. When a LISP site communicates with a remote LISP site, it maintains EID-to-RLOC
mapping information in its local map cache. In order for a LISP site to maintain an accurate status of
locators at remote LISP sites with which it is communicating, the xTR can be configured to use three
different locator reachability algorithms: tcp-count, echo-nonce, and rloc-probing. Certain algorithms
can only be enabled on certain devices.
The following locator reachability algorithms and their descriptions are as follows:
•
Cisco Nexus 7000 Series NX-OS LISP Command Reference
LSP-140
lisp loc-reach-algorithm {count-tcp | echo-nonce | rloc-probing}
no lisp loc-reach-algorithm {count-tcp | echo-nonce | rloc-probing}
Enables the tcp-count locator reachability algorithm.
Enables the echo-nonce locator reachability algorithm.
Enables the rloc-probing locator reachability algorithm.
Modification
This command was introduced.
The tcp-count algorithm is most useful when the traffic between the sites is asymmetric (but also
works for symmetric traffic patterns). The count-tcp algorithm can only be enabled on ingress tunnel
router (ITR) and Proxy ITR (PITR) devices. An egress tunnel router (ETR) does not need to
participate. The count-tcp algorithm is particularly useful in PITRs because encapsulated traffic is
not returned to a PITR. When count-tcp is configured, an ITR counts SYN and ACK TCP packets
per locator to which it encapsulates packets. Over a 1-minute period, if SYNs-seen are non-zero and
ACKs-seen are zero, the ITR assumes the locator is no longer reachable; the locator is marked to
the down status and a switchover is made to another locator if one is available. After 3 minutes, the
locator is brought back up and counting resumes.
Cisco Nexus 7000 Series LISP Commands