Cisco N5K-C5010P-BF Troubleshooting Guide - Page 35
PFC, Standard pause frames, PFC not negotiated with FCOE-capable adapters (CNA)
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Chapter 2 Troubleshooting FCoE Issues PFC Send document comments to [email protected]. PFC This section includes an overview of how to view standard pause frames, followed by a description of common problems and their solutions. Standard pause frames For ports with standard, non-CNA type host connections, the Nexus 5000 supports standard pause frames. These are enabled with the interface setting, as shown in the following example: Example: switch(config)# interface ethernet 1/16 switch(config-if)# flowcontrol ? receive Receive pause frames send Send pause frames switch(config-if)# flowcontrol receive on switch(config-if)# flowcontrol send on To view standard pause frames, use the show interface flowcontrol command. Example: switch(config-if)# show interface flowcontrol Port Send FlowControl Receive FlowControl RxPause TxPause admin oper admin oper Eth1/1 off off off off 0 0 Eth1/2 off off off off 0 0 Eth1/3 off off off off 0 0 Eth1/4 off off off off 0 0 Eth1/5 off off off off 0 0 Eth1/6 off off off off 0 0 Eth1/7 off off off off 0 0 Eth1/8 off off off off 0 0 Eth1/9 off off off off 0 0 Eth1/10 off off off off 0 0 Eth1/11 off off off off 0 0 Eth1/12 off off off off 0 0 Eth1/13 off off off off 0 0 Eth1/14 off off off off 0 0 Eth1/15 off off off off 0 0 Eth1/16 on on on on 0 0 Eth1/17 off off off off 0 0 PFC not negotiated with FCOE-capable adapters (CNA) Priority flow control (PFC) is not negotiated with FCOE-capable adapters (CNA). This causes packet drop to be noticed on FCoE traffic from the servers. Possible Causes The CNA may not support DCBX and the PFC TLV is not negotiated. Solution OL-25300-01 Cisco Nexus 5000 Series Troubleshooting Guide 2-11
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