220CHAPTER 6: CONFIGURING WX SYSTEM PARAMETERS

By default, all addresses except the host address of the VLAN, the network broadcast address, and the subnet broadcast address are included in the range. If you specify the range, the start address must be lower than the stop address, and all addresses must be in the same subnet. The IP interface of the VLAN must be within the same subnet but is not required to be within the range.

6Click OK.

Changing the Aging The aging timeout period specifies how long a dynamic entry can remain Time for FDB Entries unused before the software removes the entry from the database.

1Access the VLAN table:

a Select the Configuration tool bar option.

b In the Organizer panel, click the plus sign next to the WX switch. c Click the plus sign next to System.

d Select VLANs.

2In the Content panel, select the VLAN.

3Click Properties.

4In the Aging Time box, specify the aging timeout period (0 to 1,000,000 seconds) for dynamic entries in the forwarding database. The default is 300 seconds (5 minutes). If you specify 0, aging is disabled.

5Click OK.

Viewing and

An access control list (ACL) filters packets to restrict or permit network

Configuring ACLs

usage by certain users, network devices, or traffic types. You can also

 

assign a class of service (CoS) level, which allows priority handling, to

 

packets. For example, you can use ACLs to enable users to send and

 

receive packets within an intranet, but restrict incoming packets to the

 

server that stores confidential salary information.

 

An ACL is an ordered list of access control entries (ACEs)—rules that

 

specify how to handle packets. The rule consists of a filter and an action.

 

When a packet matches the filter, the action is applied to the packet.

 

If there are no ACE matches in the ACL, an ACL contains an implicit rule

 

that denies all access. If there is not at least one ACE that permits access

 

in an ACL, no traffic will be allowed. The implicit “deny all” rule is always

 

the last ACE of an ACL.

Page 220
Image 220
3Com 3CRWX120695A WXR100 manual Configuring ACLs, Server that stores confidential salary information, Last ACE of an ACL