04-06-2013 11:11 PM
Brocade Switch 37.1 (4020), IBM FRU 32R1820)
We have a Brocade (switch which was running with FOS version 5.3.0a in AG mode and connected to the CISCO 9509 with the OS version 4.1 (3a).
Later we upgraded the brocade FOS to 6.2.1b and after 15 days the Cisco MDS upgraded to version 5.2.1.
The procedure we followed was
1. Upgraded both the brocade in the enclosure to 6.2.1b
2. After 15 Days, One of the MDS 9509 upgraded to 5.2.1. The second MDS maintained with 5.2.1
it was working fine till we rebooted one server in the chassis. Following the reboot, that server lost one path to the storage. The path was through the MDS with an upgraded OS. During the troubleshooting, we rebooted the brocade switch which is connected to the MDS with 5.2.1 and found that all the servers except 2 of them lost its one path. Later we observerd that the external uplinks to the MDS was two and we have the two servers with both the paths. To confirm this we have connected all the 6 external uplinks to the MDS and found that 6 servers out of the 14 got two paths.
At this stage we removed all the cables and made just a single connection to the MDS with OS version 4.1(3a) to test if it could be a firmware (OS) compatibility issue and found that all the ports were showing connected. This made us to believe that the problem is with the upgraded firmware of Cisco MDS. Even though EMC confirms that V 5.2.1 is compatible with 6.2.1b, it doesnt looks like working.
Does anybody experienced similar issues? If so please help us to resolve this as its affecting our production.
Below is the switchshow of the affected switch.
switchMode:Access Gateway Mode
Area Port Media Speed State Proto
0 0 id N4 Online N-Port 20:c8:00:0d:ec:c2:23:01 0x910160
1 1 cu N4 Online F-Port 21:01:00:1b:32:29:77:d1 0x911100
2 2 cu N4 Online G-Port
3 3 cu AN No_Sync
4 4 cu N4 Online F-Port 21:01:00:1b:32:29:72:d0 0x911c00
5 5 cu N4 Online G-Port
6 6 cu N4 Online F-Port 21:01:00:1b:32:3e:11:b3 0x980100
7 7 cu N4 Online G-Port
8 8 cu N4 Online G-Port
9 9 cu N4 Online F-Port 21:01:00:1b:32:3e:e1:b0 0x912000
10 10 cu AN No_Sync
11 11 cu N4 Online G-Port
12 12 cu N4 Online F-Port 21:01:00:1b:32:a3:c4:7e 0x910600
13 13 cu N4 Online G-Port
14 14 cu AN No_Sync
15 15 id N4 Online N-Port 20:c8:00:0d:ec:c2:23:01 0x910220
16 16 id N4 Online N-Port 20:01:00:0d:ec:c2:23:01 0x980040
17 17 id N4 Online N-Port 20:c8:00:0d:ec:c2:23:01 0x910240
18 18 id N4 Online N-Port 20:32:00:0d:ec:c2:23:01 0x0b0020
19 19 id N4 Online N-Port 20:c8:00:0d:ec:c2:23:01 0x9101a0