Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual page 28

Troubleshooting guide
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Data Center Bridging
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 5 k - d o c f e e d b a c k @ c i s c o . c o m .
In the output from the show system internal dcbx info interface ethernet 1/4 command, check the
peers DCBX TLVs.
Make sure that PFC and FCoE TLV were negotiated as willing and enabled, and that there are no
errors.
Example:
switch# show system internal dcbx info interface ethernet 1/4
Peer's DCX TLV:
DCBX TLV Proto(1) type: 1(Control) DCBX TLV Length: 10 DCBX TLV Value
00 00 02 00 00 00 01 00 00 00
sub_type 0, error 0, willing 0, enable 0, max_version 0, oper_version 0
DCBX TLV Proto(1) type: 2(PriGrp) DCBX TLV Length: 17 DCBX TLV Value
00 00 c0 00 00 01 00 00 32 32 00 00 00 00 00 00 02
sub_type 0, error 0, willing 1, enable 1, max_version 0, oper_version 0
DCBX TLV Proto(1) type: 3(PFC) DCBX TLV Length: 6 DCBX TLV Value
00 00 c0 00 08 01
sub_type 0, error 0, willing 1, enable 1, max_version 0, oper_version 0
DCBX TLV Proto(1) type: 4(App(Fcoe)) DCBX TLV Length: 16 DCBX TLV Value
00 00 c0 00 89 06 00 1b 21 08 89 14 00 1b 21 08
sub_type 0, error 0, willing 1, enable 1, max_version 0, oper_version 0
Check the peer PFC and FCoE subtypes.
Use the show system internal dcbx info interface ethernet 1/4 command.
(For releases earlier than 4.2(1)N1, use the sh platform software dcbx internal info interface
ethernet x/y command.)
Example:
switch# show system internal dcbx info interface ethernet 1/4
Feature type PFC (3)
feature type 3(PFC)sub_type 0
Feature State Variables: oper_version 0 error 0 local error 0 oper_mode 1
feature_seq_no 0 remote_feature_tlv_present 1 remote_tlv_aged_out 0
remote_tlv_not_present_notification_sent 0
Feature Register Params: max_version 0, enable 1, willing 0 advertise 1
disruptive_error 0 mts_addr_node 0x101 mts_addr_sap 0x179
Desired config cfg length: 2 data bytes:08 08
Operating config cfg length: 2 data bytes:08 08
Peer config cfg length: 0 data bytes:
Feature type App(Fcoe) (4)sub_type FCoE (0)
feature type 4(App(Fcoe))sub_type 0
Feature State Variables: oper_version 0 error 0 local error 0 oper_mode 1
feature_seq_no 0 remote_feature_tlv_present 1 remote_tlv_aged_out 0
remote_tlv_not_present_notification_sent 0
Feature Register Params: max_version 0, enable 1, willing 0 advertise 1
disruptive_error 0 mts_addr_node 0x101 mts_addr_sap 0x179
Check the DCBX counters located at the very bottom of the output display from the show system
internal dcbx info interface ethernet 1/4 command. Look for any errors.
Example:
Traffic Counters
DCBX pkt stats:
Total frames out: 15383
Total Entries aged: 97
Total frames in: 15039
DCBX frames in: 15033
Total frames received in error: 6
Total frames discarded: 6
Total TLVs unrecognized: 0
Cisco Nexus 5000 Series Troubleshooting Guide
2-4
Chapter 2
Troubleshooting FCoE Issues
OL-25300-01

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