Cisco Cisco Web Security Appliance S370 사용자 가이드

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AsyncOS 9.1 for Cisco Web Security Appliances User Guide

Appendix A Troubleshooting

Virtual Appliances

Do Not Use Force Reset, Power Off, or Reset Options During AsyncOS Startup

The following actions on your virtual host are the equivalent of pulling the plug on a hardware appliance
and are not supported, especially during AsyncOS startup:

•

In KVM, the Force Reset option.

•

In VMWare, the Power Off and Reset options. (These options are safe to use after the appliance has
come up completely.)

Network Connectivity on KVM Deployments Works Initially, Then Fails

Problem

Network connectivity is lost after previously working.

Solution

This is a KVM issue. See the section on "KVM: Network connectivity works initially, then

fails" in the OpenStack documentation at

http://docs.openstack.org/admin-guide-cloud/content/section_network-troubleshoot.html

Slow Performance, Watchdog Issues, and High CPU Usage on KVM
Deployments

Problem

Appliance performance is slow, watchdog issues occur, and the appliance shows unusually high

CPU usage when running on an Ubuntu virtual machine.

Solution

Install the latest Host OS updates from Ubuntu.

General Troubleshooting for Virtual Appliances Running on Linux Hosts

Problem

Issues with virtual appliances running on KVM deployments may be related to host OS

configuration issues.

Solution

See the troubleshooting section and other information in the Virtualization Deployment and

Administration Guide, available from
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/pdf/Virtualization_Depl
oyment_and_Administration_Guide/Red_Hat_Enterprise_Linux-7-Virtualization_Deployment_and_A
dministration_Guide-en-US.pdf.

WCCP Problems

Maximum Port Entries

In deployments using WCCP, the maximum number of port entries is 30 for HTTP, HTTPS , and FTP
ports combined.