Brocade Communications Systems 8 Administrator's Manual page 107

6. Confirm FCIP tunnel is configured correctly.
7.
Symptom FCIP tunnel goes online and offline.
Probable cause and recommended action
A bouncing tunnel is one of the most common problems. This issue is usually because of an over
commitment of available bandwidth resulting in the following behaviors.
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Take the following steps gather information.
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Fabric OS FCIP Administrator's Guide
53-1001766-01
Refer to the Fabric OS Administrator's Guide to review the setup of the ipRoute.
The Compression, Fastwrite, and Tape Pipelining settings must match the opposite endpoint or
the tunnel may not come up. Remote and local IP and WWN should be opposite each other.
portshow fciptunnel ge1 all
Port: ge1
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Tunnel ID 0
Tunnel Description Not Configured
Remote IP Addr 20.24.60.164
Local IP Addr 20.23.70.177
Remote WWN Not Configured
Local WWN 10:00:00:05:1e:37:0d:59
Compression off
Fastwrite off
Tape Pipelining off
Committed Rate 1000000 Kbps (1.000000 Gbps)
SACK on
Min Retransmit Time 100
Keepalive Timeout 10
Max Retransmissions 8
VC QoS Mapping off
DSCP Marking (Control): 0, DSCP Marking (Data): 0
VLAN Tagging Not Configured
TCP Byte Streaming off
Status : Active
Connected Count: 2
Uptime 31 seconds
Get a GE ethernet sniffer trace.
Rule out all possible blocking factors. Routers and firewalls that are in the data path must be
configured to pass FCIP traffic (TCP port 3225) and IPSec traffic, if IPsec is used (UDP port
500). If possible blocking factors have been rule out, simulate a connection attempt using the
portCmd ping command, from source to destination, and then take an Ether trace between
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the two endpoints. The Ether trace can be examined to further troubleshoot the FCIP
connectivity.
Too much data tries to go over the link.
Management data gets lost, queued too long, and timeouts expire.
Data exceeds timeouts multiple times.
Verify what link bandwidth is available.
Confirm the IP path is being used exclusively for FCIP traffic.
FCIP tunnel issues
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