Cisco MDS9216i VSAN not merging and FCIP up but not trunking

Unanswered Question
Nov 22nd, 2007

I have configured FCIP between DC and DR IPSAN switches. FCIP is up but not trunking. On both switches trunk mode is on. Hence my VSAN (id 20 on both switches) not merging.

See below FCIP interface status...

fcip1 is up

Hardware is GigabitEthernet

Port WWN is 20:10:00:0d:ec:35:68:40

Peer port WWN is 20:10:00:0d:ec:34:d6:80

Admin port mode is auto, trunk mode is on

snmp traps are enabled

Port mode is E, FCID is 0x9a0002

Port vsan is 1

Speed is 1 Gbps

Using Profile id 1 (interface GigabitEthernet1/1)

Peer Information

Peer Internet address is 10.128.1.95 and port is 3225

Write acceleration mode is configured off

Tape acceleration mode is configured off

Tape Accelerator flow control buffer size is automatic

Ficon Tape acceleration configured off for all vsans

IP Compression is disabled

Special Frame is disabled

Maximum number of TCP connections is 2

Time Stamp is disabled

QOS control code point is 0

QOS data code point is 0

B-port mode disabled

TCP Connection Information

2 Active TCP connections

Control connection: Local 10.132.1.95:65260, Remote

10.128.1.95:3225

Data connection: Local 10.132.1.95:65262, Remote 10.128.1.95:3225

138 Attempts for active connections, 16 close of connections

TCP Parameters

Path MTU 1420 bytes

Current retransmission timeout is 200 ms

Round trip time: Smoothed 22 ms, Variance: 4 Jitter: 661 us

Advertized window: Current: 2412 KB, Maximum: 2412 KB, Scale: 5

Peer receive window: Current: 2047 KB, Maximum: 2047 KB, Scale: 5

Congestion window: Current: 1170 KB, Slow start threshold: 1950 KB

Current Send Buffer Size: 2412 KB, Requested Send Buffer Size: 0 KB

CWM Burst Size: 50 KB

5 minutes input rate 328 bits/sec, 41 bytes/sec, 0 frames/sec

5 minutes output rate 256 bits/sec, 32 bytes/sec, 0 frames/sec

3551 frames input, 419612 bytes

3443 Class F frames input, 406076 bytes

108 Class 2/3 frames input, 13536 bytes

8 Reass frames

0 Error frames timestamp error 0

3572 frames output, 324264 bytes

3464 Class F frames output, 312996 bytes

108 Class 2/3 frames output, 11268 bytes

0 Error frames

-----------------------

I have one more pair of IPSAN switches. I configured them which are working fine. FCIP interface is showing "trunking". I have compared the configuration of working and non-working pairs and both are same (except the IP address of locate and remote and VSAN ids).

Please suggest what can be done. If I get the FCIP port in trunking, I hope VSAn will start merging.

I have this problem too.
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colin.mcnamara Fri, 11/23/2007 - 09:33

The problem is here -

Port mode is E, FCID is 0x9a0002

Port vsan is 1

What it says is yes, it is a trunk , but only an E port. So it is only trunking the port VSAN 1. What you want to do is change it to a Trunking E port, which allows it to carry multiple vsans over the link.

The other option is to change the port VSAN to 20. That will get you up, but if you need to trunk more vsans in the future you will still have to change the FCIP to a TE port.

When everything is right it should look something like this -

P28-MDS-9216# sho interface fcip 2

fcip2 is trunking

Hardware is GigabitEthernet

Port WWN is 20:42:00:0d:ec:0c:e6:40

Peer port WWN is 20:42:00:0d:65:6a:18:40

Admin port mode is auto, trunk mode is on

snmp traps are enabled

Port mode is TE

Port vsan is 1

Speed is 1 Gbps

Trunk vsans (admin allowed and active) (1,20)

Trunk vsans (up) (1,20)

Trunk vsans (isolated) ()

Trunk vsans (initializing) ()

Using Profile id 1 (interface GigabitEthernet2/1)

Peer Information

Peer Internet address is 10.2.28.2 and port is 3225

Write acceleration mode is configured off

Tape acceleration mode is configured off

Tape Accelerator flow control buffer size is automatic

Ficon Tape acceleration configured off for all vsans

IP Compression is disabled

Special Frame is disabled

Maximum number of TCP connections is 2

Time Stamp is disabled

The document for configuring FCIP trunks on the MDS is available here -

http://www.cisco.com/univercd/cc/td/doc/product/sn5000/mds9000/3_0/clicnfg/part6/cfcip.htm

If you found this helpful please rate it -

-- Colin McNamara

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