Riverstone Networks WICT1-12 - Manual (Page 152)

8-18 Riverstone Networks RS Switch Router User Guide Release 8.0
Routing ATM Traffic ATM Configuration Guide
To switch packets between two ATM ports, you would specify the
atm set cross-connect
command for both
ports. For example, to configure a cross-connect between at.1.1.0.100 and at.2.1.0.101, enter the following:
Note You can configure cross-connects on the multi-rate line card only.
8.5.3 Limiting MAC Addresses Learned on a VC
You can limit the number of MAC addresses learned on a VC. This security feature prevents users from purposely
filling the L2 tables. You can set the limit between 0 and 127. However, at least one MAC address should be allowed
on each VC.
When you specify a limit for the number of MAC addresses learned, that limit applies only to the additional MAC
addresses that will be learned after the command was entered. If you specify a limit of 10 MAC addresses and the RS
has already learned 3, then the total number of MAC addresses that can be learned on the VC is 13. But once enough
MAC addresses have aged out to bring the number of addresses learned to below the limit you set, then the maximum
number of MAC addresses learned will not exceed the limit.
The following example limits the number of MAC addresses learned on at.1.1.0.100:
8.6 ROUTING ATM TRAFFIC
Configuring IP and IPX interfaces for ATM modules is generally the same as for WANs and LANs. You assign an IP
address to each interface and configure routing protocols such as OSPF or BGP. You can configure the IP interface on
a physical port or as part of a VLAN. The ATM multi-rate line card supports IP-based VLANs, and the ATM OC-12
line card supports IP and IPX-based VLANs.
Creating an interface on an ATM port assigns a network IP address and submask on that port, and assigns it to a
specified VC (VPI/VCI pair). Since a VC is a connection in the ATM Layer only, creating an interface for an ATM
port is necessary to establish a connection in the IP network layer.
The following example illustrates how you can use routing on an ATM module to accommodate different requirements
from two client groups using only one ATM physical connection. This is accomplished by setting up two VCs on the
ATM port, each with its own service profiles and bandwidth.
atm set cross-connect at.1.1.0.100 to at.2.1.0.101
atm set cross-connect at.2.1.0.101 to at.1.1.0.100
atm set vcl port at.1.1.0.100 mac-addr-limit 10