510 BigIron RX Series Configuration Guide
53-1002253-01
Configuring rate limiting policies
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The vlan <vlan-number> parameter species the VLAN ID to which the policy applies. Refer to
“Configuration considerations” on page 507 to determine the number of rate limiting policies that
can be configured on a device.
For information on the other parameters, refer to “Configuring a port-based rate limiting policy” on
page 508.
Configuring a VLAN-group-based rate limiting policy
A rate limiting policy can be applied to a VLAN group. VLANs that are members of a VLAN group
share the specified bandwidth defined in the rate limiting policy applied to that group.
To configure a rate limiting policy for a VLAN group, do the following.
1. Define the VLANs that you want to place in a rate limiting VLAN group.
2. Define a rate limiting VLAN group (it is specific to the rate limiting feature) and assign VLANs to
it. To define a rate limiting VLAN group, use the rl-vlan-group command at the CONFIG level. To
assign VLANs to the group, use the vlan command at the VLAN group rate limiting configuration
level.
For example, enter the following.
BigIron RX(config)# rl-vlan-group 10
BigIron RX(config-rl-vlan-group-10)# vlan 3 5 to 7
BigIron RX(config-rl-vlan-group-10)# exit
The commands assign VLANs 3, 5, 6, and 7 to rate limiting VLAN group 10.
Syntax: [no]rl-vlan-group <vlan-group-number>
Syntax: [no]vlan <vlan-number> [to <vlan-number]
The rl-vlan-group command defines a rate limiting VLAN group and takes you to the VLAN group
rate limiting configuration level.
<vlan-group-number> specifies the VLAN group that you want to create.
The vlan command assigns VLANs to the rate limiting VLAN group. Possible values are
individual VLAN IDs or a range of VLAN IDs.
3. Create a rate limiting policy for the VLAN group and apply it to the interface. Enter the
command such as the following at the interface level.
BigIron RX(config-if-e1000-1/4)# rate-limit in group 10 500000000 750000000
The command configures a rate limiting policy on port 1/4 that limits the rate of inbound
traffic (packets tagged with VLANs 3, 5, 6, or 7 from VLAN group 10) from VLAN group 10 to
500 Mbps with a maximum burst size of 750 Mbits.
Syntax: rate-limit in group <group-number> <requested-rate> <maximum-burst>
The group <group-number> parameter specifies the rate limiting VLAN group.
For information on the other parameters, refer to “Configuring a port-based rate limiting policy”
on page 508.
4. To apply a rate limiting policy to a VLAN group whose traffic is prioritized by hardware
forwarding queues, enter the command such as the following in lieu of step number 3.
BigIron RX(config-if-e1000-1/4)# rate-limit in group 10 priority 5 priority 6
500000000 750000000
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