Cisco N5K-C5010P-BF Troubleshooting Guide - Page 92

Possible Cause, show logging, Solution, debug fspf all, undebug all, show fspf vsan, interface, Step 1

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FC Services Chapter 5 Troubleshooting SAN Switching Issues Send document comments to [email protected]. 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 7 LSA 7 Hello 238 Error packets 218 Number of packets transmitted : LSU 7 LSA 7 Hello 180 Retransmitted LSU 0 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: %$VSAN %$ Mismatch in Dead timer in the Hello packet on interface san-port-channel N5K-2 %FSPF-3-FC2_PROC_ERR: %$VSAN %$ Error in processing HELLO packet on interface san-port-channel , Error = Bad packet received Solution To identify a mismatch of dead intervals on an ISL using the NX-OS CLI, perform the following steps: Step 1 Step 2 Either use the debug fspf all command and look for wrong dead interval messages 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. 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. Step 3 Use the show fspf vsan interface command to view the FSPF configuration on both switches. 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 4 LSA 4 Hello 27 Error packets 4 Number of packets transmitted : LSU 4 LSA 4 Hello 38 Retransmitted LSU 0 Number of times inactivity timer expired for the interface = 0 5-20 Cisco Nexus 5000 Series Troubleshooting Guide OL-25300-01

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Send document comments to [email protected].
5-20
Cisco Nexus 5000 Series Troubleshooting Guide
OL-25300-01
Chapter 5
Troubleshooting SAN Switching Issues
FC Services
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
7
LSA
7
Hello 238
Error packets 218
Number of packets transmitted : LSU
7
LSA
7
Hello 180
Retransmitted LSU
0
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
packet on
interface san-port-channel <channel-id>, Error
= Bad packet received
Solution
To identify a mismatch of dead intervals on an ISL using the NX-OS CLI, perform the following steps:
Step 1
Either use the
debug fspf all
command and look for wrong dead interval messages
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
Step 2
Use the
undebug all
command to turn off debugging.
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.
Step 3
Use the
show fspf vsan
<vsan-id>
interface
command to view the FSPF configuration on both switches.
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
4
LSA
4
Hello 27
Error packets 4
Number of packets transmitted : LSU
4
LSA
4
Hello 38
Retransmitted LSU
0
Number of times inactivity timer expired for the interface = 0