Foundry BigIron RX Series Configuration Guide

11-6 © 2006 Foundry Networks, Inc. April 2006

VLAN Byte Accounting

To enable your BigIron RX to perform accounting of the number of bytes received by all the member ports of a

VLAN. This includes the preamble and the minimum inter-frame gap in Ethernet. The byte counts can then be

viewed using the show vlan command. VLAN byte accounting is disabled by default.

Considerations When Configuring VLAN Byte Accounting

• VLAN byte accounting cannot be enabled for the default or control VLANs.

• The number of VLANs on which byte accounting can be enabled system-wide is restricted by the number of

VLANs with byte accounting enabled on a given packet processor and the number of rate limiting policies

enabled on the same packet processor ports. See Table 11.1 for details.

• On a given packet processor, the total number of VLANs with byte accounting enabled and the number of

ACL-based and VLAN-based rate limiting policies is dependent on the interface module. See Table 11.1 for

details.

• If a port's VLAN has byte accounting enabled, you cannot enable rate limiting on that port. Similarly, if a port

has rate limiting enabled, you cannot enable VLAN byte accounting on that port's VLAN.

• Clearing the rate limiting counters using clear rate-limit counters will also clear VLAN byte-accounting

counters. It is recommended that when using rate limiting along with VLAN byte accounting, use individual

port rate limiting counters.

Configuring VLAN Byte Accounting

To enable VLAN accounting on a specified VLAN, use the following commands:

BigIron RX(config)# vlan 10

BigIron RX(config-vlan-10)# byte-accounting

Syntax: [no] byte-accounting

Displaying VLAN Byte Accounting Information

To display VLAN accounting information for all VLANs configured on a router, use the show vlan command as

shown:

BigIron RX# show vlan

Configured PORT-VLAN entries: 2

Maximum PORT-VLAN entries: 512

Default PORT-VLAN id: 1

PORT-VLAN 1, Name DEFAULT-VLAN, Priority Level0

L2 protocols : NONE

Untagged Ports : ethe 1/1 to 1/40 ethe 2/1 to 2/4

PORT-VLAN 10, Name [None], Priority Level0

L2 protocols : NONE

Tagged Ports : ethe 1/2 to 1/5

Bytes received : 18527