Cisco 9134 - MDS Multilayer Fabric Switch User Manual

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20-56
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 20 Troubleshooting IP Storage Services
iSCSI TCP Performance Issues
0 abort due to no memory, 0 duplicate SYN, 2 no-route SYN drop
0 hash collisions, 0 retransmitted
TCP Active Connections
Local Address Remote Address State Send-Q Recv-Q
10.48.69.250:3260 10.48.69.233:1026 ESTABLISH 0 0
10.48.69.250:3260 10.48.69.233:1057 ESTABLISH 29296 0
0.0.0.0:3260 0.0.0.0:0 LISTEN 0 0
Use the show iscsi remote-node fcp-session-detail CLI command to view details of the session status.
(See Example 20-4.) The RcvDataFieldSize will be set to the maximum 2048 if the MTU is increased
on the Gigabit Ethernet interface that corresponds to this iSCSI remote node. Use the Target FCID field
to verify that the local port, rather than a remote port that is reached through an ISL link, is used for the
storage target to avoid suboptimal access to storage.
Example 20-4 show iscsi remote-node fcp-session-detail Command Output
MDS_BOTTOM# show iscsi remote-node fcp-session-detail
iSCSI Node name is iqn.1987-05.com.cisco:02.75af2f95624c.shark-nas
iSCSI alias name: SHARK-NAS
Node WWN is 20:00:00:0c:30:6c:24:42 (dynamic)
Member of vsans: 777, 778
Number of Virtual n_ports: 1
Virtual Port WWN is 20:00:00:0c:30:6c:24:42 (configured)
Interface iSCSI 2/1, Portal group tag is 0x1001
VSAN ID 0, FCID 0x610001
No. of FC sessions: 1
No. of iSCSI sessions: 1
FCP Session details
Target FCID: 0x000000 (S_ID of this session: 0x000000)
pWWN: 00:00:00:00:00:00:00:00
nWWN: 00:00:00:00:00:00:00:00
Session state: INIT
1 iSCSI sessions share this FC session
Target:
Negotiated parameters
RcvDataFieldSize 2048 our_RcvDataFieldSize 1392
MaxBurstSize 0, EMPD: FALSE
Random Relative Offset: FALSE, Sequence-in-order: Yes
Statistics:
PDU: Command: 0, Response: 0
VSAN ID 777, FCID 0x610001
No. of FC sessions: 1
No. of iSCSI sessions: 1
FCP Session details
Target FCID: 0x610000 (S_ID of this session: 0x610001)
pWWN: 50:05:07:63:00:c8:94:4c
nWWN: 50:05:07:63:00:c8:94:4c
Session state: LOGGED_IN
1 iSCSI sessions share this FC session
Target: shark_nas
Negotiated parameters
RcvDataFieldSize 2048 our_RcvDataFieldSize 1392
MaxBurstSize 0, EMPD: FALSE
Random Relative Offset: FALSE, Sequence-in-order: Yes
Statistics:
PDU: Command: 0, Response: 1612007

Cisco 9134 - MDS Multilayer Fabric Switch Specifications

General

Brand	Cisco
Model	9134 - MDS Multilayer Fabric Switch
Category	Switch
Language	English