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Cisco Bug: CSCvs38302 - Shared service traffic drop from pod1 RL -> pod2 LL with RLD enabled

Last Modified

Aug 28, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

14.2(3g)

Description (partial)

Symptom:
Inter-vrf traffic forwarding may not work when using the remote leaf direct forwarding feature.

Conditions:
Consider the following topology:

    EP in vrf A
+-------+-------------+
|     Legacy          |
+----+----------+-----+
     |          |
+----+----+ +---+-----+
| RL2010  | | RL2011  |
| (pod2)  | | (pod2)  |
+--------++ ++--------+
         |   |
       +-+---+-+
       |  ISN  +----------------------+
       +---+---+                      |
           |                          |
           |                          |
+----------+----------+      +--------+-----------+
|   pod2 spines       |      |   pod1 spines      |
|                     |      |                    |
+---------------------+      +---------+----------+
                                       |
                                       |
                             +---------+----------+
                             |   pod1 leafs       |
                             |                    |
                             +--------------------+

                              EP in vrf B
							  
-In this scenario the flow is between an endpoint connected to a remote leaf in one vrf destined to an endpoint connected to a base pod that is not in the same pod as the remote leaf and is in a different vrf.
-Remote Leaf Direct Forwarding must also be enabled.
-Vrf B must not be deployed to the remote leaf pair.

In the above example traffic will be dropped on the pod 1 spines as it is being received from the ISN/RL's
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