HP StorageWorks Enterprise File Services WAN Accelerator 2.1.7 Deployment Guide (407118 - 003, June 2006)

124 11 - TROUBLESHOOTING DEPLOYMENT PROBLEMS
Problem: Old Anti-Virus Software
If, after installing HP EFS WAN Accelerators, accessing applications over the network
does not speed up or certain operations on files (such as dragging and dropping files)
speed up greatly but accessing applications does not, it could be due to old anti-virus
software installed on a network client.
Solution:
Upgrade
Anti-Virus
Software
If it is safe to do so, temporarily disable the anti-virus software and try opening files
while it is disabled. If performance improves with anti-virus software disabled, HP
recommends that you upgrade the anti-virus software.
If performance does not improve with anti-virus software disabled or after upgrading
anti-virus software, contact HP Technical Support at www.hp.com.
Similar
Problems
See also these similar problems:
 “Problem: Unavailable Opportunistic Locks” on page 128
 “Problem: Server Message Block Signed Sessions” on page 126
Problem: Packet Ricochet
If network connections fail on their first attempt but succeed on subsequent attempts,
it could be due to packet ricochet. You should suspect packet ricochet if:
 The HP EFS WAN Accelerator on one or both sides of a network has an in-path
interface that is different than that of the local host.
 There are no in-path routes defined in your network.
 You experience packet ricochet symptoms. Symptoms of packet ricochet are:
 Connections between the HP EFS WAN Accelerator and the clients or server
are routed through the WAN interface to a WAN gateway, and then they are
routed through an HP EFS WAN Accelerator to the next-hop local area
network (LAN) gateway.
 The WAN router drops SYN packets from the HP EFS WAN Accelerator
before it issues an Internet Control Message Protocol (ICMP) redirect.
Solution: Add
In-Path Routes
To prevent packet ricochet, add in-path routes to local destinations, as described in the
HP Enterprise File Services WAN Accelerator Management Console User Guide.
Solution: Use
Simplified
Routing
Another way of preventing packet ricochet is to use simplified routing. To configure
simplified routing, use the CLI command in-path simplified routing.
For more information about simplified routing, see the HP StorageWorks Enterprise
File Services WAN Accelerator Command-Line Interface Reference Manual or the HP
Enterprise File Services WAN Accelerator Management Console User Guide.