Brocade Communications Systems StoreFabric SN6500B Troubleshooting Manual page 35

In the following example, superping is invoked using the fcPing --allpaths command to destination
domain 165. The following example displays each hop as (Domain1/Index1-> Domain2/Index2)
format. To reach destination domain 165 from source domain 3 there are 2 unique end-to-end
paths. In the first path, the frame traverses from egress port index 205 on source domain 3 to
ingress port index 25 on domain 207. On domain 207 the frame traverses from egress port index
42 to ingress port index 3 in domain 101. On domain 101 the frame goes from egress port index
16 to ingress port index 99 on domain 165.
ECP80:FID128:admin> fcping -allpaths 165
Pinging(size:12 bytes) destination domain 165 through all paths
PATH SWITCH1-->
---------------------------------------------------------------------------------
1. (3/EMB, 3/205)[128] (207/25,207/42)[128] (101/3,101/16)[128] (165/99,165/0)[128]
2. (3/EMB, 3/204)[128] (207/27,207/42)[128] (101/3,101/16)[128] (165/99,165/0)[128]
Superping can isolate links with failures so that you can further investigate these ISLs to determine
the exact links giving the errors.
NOTE
Superping provides an indication if all ISLs are covered. If all the ISLs are not covered, you can
increase the coverage count and maximum retries to transmit, so that complete coverage of all ISLs
is achieved.
Consider the following example in which a few errors are recorded on ISLs 3/205-->2/25,
3/204-->2/27, 2/42-->101/3, and 2/1-->101/8. But a maximum of 100 percentage
errors are recorded on internal port 0/284 on domain 2, which is the potential faulty link.
ISL COVERAGE
-------------
SNO
-----------------------------------------------------------------------------
1
2
3
4
6
7
INTERNAL PORT COVERAGE
-----------------------
SNO
-----------------------------------------------------------------------------
1
2
3
4
When an echo frame is dropped, all the ISLs in the path are marked as failed. It is not possible to
determine the exact ISL link that dropped the frame. Due to this, all the ISLs in the path record
some failures. But the ISL with the actual error, has the maximum percentage of failures, as this
ISL when selected in any possible path causes the echo frame to be dropped and accumulates a
higher failure percentage.
Fabric OS Troubleshooting and Diagnostics Guide
53-1002751-01
FC-FC routing connectivity
SWITCH2-->
ISL
3/123[128]--> 165/96[128]
3/205[128]--> 2/25[128]
3/204[128--> 2/27[128]
165/99[128]--> 101/16[128]
2/42[128]--> 101/3[128]
2/1[128]--> 101/8[128]
DOMAIN INTRNL_PORT
2[128] 0/272 SUCCESS(40/40)
2[128] 0/276 SUCCESS(44/44)
2[128] 0/280 SUCCESS(30/30)
2[128] 0/284 FAILURE(20/20) <== 100% failure
SWITCH3 SWITCH4
STATUS
SUCCESS(5/5)
FAILURE(7/50)
FAILURE(11/50)
SUCCESS(5/5)
FAILURE(10/67)
FAILURE(8/33)
STATUS
2
STATUS
SUCCESS
SUCCESS
19