Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual page 92

FC Services
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 .
switch(config-if)# show fspf vsan 200 interface san-port-channel 200
FSPF interface san-port-channel 200 in VSAN 200
FSPF routing administrative state is active
Interface cost is 125
Timer intervals configured, Hello 40 s, Dead 80 s, Retransmit 5 s
FSPF State is FULL
Neighbor Domain Id is 0x18(24)
Neighbor Interface is san-port-channel 200 (0x000400c7)
Statistics counters :
Number of packets received : LSU
Number of packets transmitted : LSU
Number of times inactivity timer expired for the interface = 32
Possible Cause
The FSPF dead interval is misconfigured.
The following example shows possible log messages from the show logging command:
Example:
%FSPF-3-HELLO_MISMATCH: %$VSAN <vsan-id>%$ Mismatch in Dead timer in the Hello packet on
interface san-port-channel <channel-id>
N5K-2 %FSPF-3-FC2_PROC_ERR: %$VSAN <vsan-id>%$ Error in processing HELLO
interface san-port-channel <channel-id>, Error
Solution
To identify a mismatch of dead intervals on an ISL using the NX-OS CLI, perform the following steps:
Either use the debug fspf all command and look for wrong dead interval messages
Step 1
or check the last messages in the show logging command log for an error message.
The debug output generates the following messages:
fspf: Wrong hello interval for packet on interface 40000c7 in VSAN 200
fspf: Error in processing hello packet , error = Bad packet received
Use the undebug all command to turn off debugging.
Step 2
Tip Open a second Telnet or SSH session before entering any debug commands. If the debug output
overwhelms the current session, you can use the second session to enter the undebug all command to
stop the debug message output.
Use the show fspf vsan <vsan-id> interface command to view the FSPF configuration on both switches.
Step 3
Example:
switch# show fspf vsan 200 interface san-port-channel 200
FSPF interface san-port-channel 200 in VSAN 200
FSPF routing administrative state is active
Interface cost is 125
Timer intervals configured, Hello 20 s, Dead 120 s, Retransmit 5 s
FSPF State is INIT
Statistics counters :
Number of packets received : LSU
Number of packets transmitted : LSU
Number of times inactivity timer expired for the interface = 0
Cisco Nexus 5000 Series Troubleshooting Guide
5-20
Chapter 5
7 LSA 7 Hello 238 Error packets 218
7 LSA 7 Hello 180
= Bad packet received
4 LSA 4 Hello 27 Error packets 4
4 LSA 4 Hello 38
Troubleshooting SAN Switching Issues
Retransmitted LSU 0
packet on
Retransmitted LSU 0
OL-25300-01