Cisco MDS 9000 Series

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5-51
Cisco MDS 9000 Family Troubleshooting Guide
OL-5183-02, Cisco MDS SAN-OS Release 1.3
Chapter 5 Troubleshooting IP Storage Issues
Fine Tuning/Troubleshooting IPS iSCSI TCP Performance
5980106 window updates, 0 window probe
50 pcb hash miss, 0 no port, 0 bad SYN, 0 paws drops
TCP Connection Stats
0 attempts, 24 accepts, 24 established
22 closed, 2 drops, 0 conn drops
0 drop in retransmit timeout, 0 drop in keepalive timeout
0 drop in persist drops, 0 connections drained
TCP Miscellaneous Stats
7054414 segments timed, 7067879 rtt updated
0 retransmit timeout, 0 persist timeout
19 keepalive timeout, 19 keepalive probes
TCP SACK Stats
0 recovery episodes, 54218621 data packets, 77791012992 data bytes
0 data packets retransmitted, 0 data bytes retransmitted
1 connections closed, 0 retransmit timeouts
TCP SYN Cache Stats
24 entries, 24 connections completed, 0 entries timed out
0 dropped due to overflow, 0 dropped due to RST
0 dropped due to ICMP unreach, 0 dropped due to bucket overflow
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
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
Will be set to maximum 2048 if the MTU is increased on the Gigabit interface
corresponding to this iscsi remote-node. See below for an example.
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)