Nexus 5548UP FC Connectivity Issue

[imadhassan]

Hi, we are connecting Nexus 5548UP with Dell Storage over fibre channel ports, the port status is showing "link not failed or Not connected" when I put the speed 8Gb, but when the speed mode is auto it sets the speed to 4gb and the ;ink status is coming UP, but after few moments the link goes down and generate the following message,

Nexus-Primary# 2015 Nov 11 10:41:21.999201 fcns: vsan 101: fc_ct_parse_frame() succeeded - request_id = 37, flags = 0
2015 Nov 11 10:41:21.999436 fcns: vsan 101: received query NS_CMD_GID_PT
2015 Nov 11 10:41:21.999647 fcns: vsan 101: Applying zoning constraints on this query; limiting search space to the zone(s) containing port-id 0x120000
2015 Nov 11 10:41:22.000037 fcns: vsan 101: Got entry matching the object in the query; entry belongs to port-id 0x120000
2015 Nov 11 10:41:22.000252 fcns: vsan 101: port-id 0x120000 is in the same zone
2015 Nov 11 10:41:22.000465 fcns: vsan 101: sending accept response to port-id 0x120000
2015 Nov 11 10:41:36.508191 fcns: vsan 101: received vsan range config change notification
2015 Nov 11 10:41:36.508480 fcns: vsan 101: Received deregistration request through MTS; num ports to be deregistered 1
2015 Nov 11 10:41:36.508725 fcns: vsan 101: Deleted entry for port-id 0x120000
2015 Nov 11 10:41:36.508943 fcns: vsan 101: Sending notification to other modules; port-id 0x120000, event 1, modified objects 0
2015 Nov 11 10:41:36.509549 fcns: vsan 101: Deleting entry from pss
2015 Nov 11 10:41:36.509797 fcns: vsan 101: Sending sync message to the standby
2015 Nov 11 10:41:36.510010 fcns: vsan 101: Sending sync message to the standby
2015 Nov 11 10:41:36.510245 fcns: vsan 101: Deleting entry from ext db pss
2015 Nov 11 10:41:36.510483 fcns: vsan 101: Sending ext sync message to the standby
2015 Nov 11 10:41:36.510695 fcns: vsan 101: Sending ext sync message to the standby
2015 Nov 11 10:41:36.510941 fcns: vsan 101: received notification from rib
2015 Nov 11 10:41:36.511158 fcns: vsan 101: Domain 18 has become unreachable; Aborting all requests sent to this switch

Kidnly let me know what could be possible issue though the required features are enabled (fcoe,lldp,npiv)

regards,

[Mordechay Amir]

Hi,

LLDP and NPIV are not related here since you are facing an issue with the initial connectivity.

LLDP is used with FCoE and NPIV is used when you are connecting an NPV switch and allowing multiple flogis to come from F port.

I would reccomand verifying the type of SPFs that you are using on both ends. it must match the same wavelength (nanometers) and fiber type.

for example DS-SFP-FC8G-LW will not operate with DS-SFP-FC8G-SW.

good luck.

[Walter Dey]

Can you please provide more information, eg.

sho flogi database vsan 101

show fcns database vsan 101

show fdmi database detail vsan 101

show interface fc ......

similar behaviour has been discussed before

https://supportforums.cisco.com/discussion/10448456/npivvmware-registeres-and-disappears