Cabletron Systems GIGAswitch GSR-16, Руководство пользователя

Страница: 273 / 346

DIGITAL GIGAswitch/Router User Reference Manual 249
Enabling ACL Logging
This command creates a Profile ACL called prof5 that uses as its selection criteria all
packets with a source address of 1.2.3.4 and a destination address of 10.10.10.10:
To have packets matching Profile ACL prof5’s selection criteria bypass the cache servers,
use the following command:
When the Web caching policy is applied to an interface, information in packets originating
from source address 1.2.3.4 and destined for address 10.10.10.10 is not sent to the cache
servers.
See “Web Caching” on page 219 for more information on using the web-cache command.
Enabling ACL Logging
To see whether incoming packets are permitted or denied because of an ACL, you can
enable ACL Logging when applying the ACL. When ACL Logging is turned on, the
router prints out a message on the console about whether a packet is forwarded or
dropped. If you have a Syslog server configured for the GSR, the same information will
also be sent to the Syslog server.
Before enabling ACL Logging, you should consider its impact on performance. With ACL
Logging enabled, the router prints out a message at the console before the packet is
actually forwarded or dropped. Even if the console is connected to the router at a high
baud rate, the delay caused by the console message is still significant. This can get worse if
the console is connected at a low baud rate, for example, 1200 baud. Furthermore, if a
Syslog server is configured, then a Syslog packet must also be sent to the Syslog server,
creating additional delay. Therefore, you should consider the potential performance
impact before turning on ACL Logging.
gs/r(config)# acl prof5 permit ip 1.2.3.4 10.10.10.10
gs/r(config)# web-cache policy1 create bypass-list profile prof5