Cisco Cisco Dynamic Fabric Automation for OpenStack Troubleshooting Guide

Cisco Dynamic Fabric Automation Production Troubleshooting Guide

acorn3# show ecp detail

ECP (Edge Control Protocol)

Retrans timer init : 14

Max retries : 3

Mode : LAN

No. rx packet : 265272

No. tx packet : 281847

1 Plugin(s):

ULP ID Description Status

--------- -------------------- --------

1 VDP Plugin Enabled

1 Session(s):

Interface S-Vlan Peer MAC Sess ID RxSeq TxSeq

--------------- ------- -------------- ------------ ------- -------

Eth1/26 1 0002.3d40.6403 1 36414 33264

[1]

Interface: Ethernet1/26

Index: 0x1a019000

S-Vlan: 1

Sess ID: 1

Peer addr: 0002.3d40.6403

Rx seq: 36414

Tx seq: 33264

141840 packets 12760 duplicate 0 drop

114592 packets 12655 retry 3922 error

In the above example, a VDP Station has been detected over interface Ethernet1/26. Rx and Tx error counters for this
session indicate ECP packets did not flow reliably at some point:

RX duplicate: This counter is incremented when a PDU with a lower sequence number than the last received

sequence number is received.

RX drop: this counter is incremented when the receive queue size is full. As each packet should be acknowl-

edged before the next packet is sent out, this should be an unusual situation.

Tx retry: this counter is incremented when the last transmitted packet has not been acknowledged for the du-

ration of the retransmission timer and a retry is attempted

Tx error: this counter is increment when the last transmitted packet has not been acknowledged during the fi-

nal retry.

From there, if the lower layer ECP was carrying a VDP packet, this packet will be sent to the evb process for further
processing. The show evb command provides counters on the number of VDP PDUs and VDP TLVs received by the
evb process:

acorn3# show evb

EVB (Edge Virtual Bridge)

Role : VDP bridge