When QoS is applied on the bundle for either the ingress or egress direction, QoS is applied at each member
interface.
The Link Bundling feature supports all the QoS features described in the Cisco ASR 9000 Series Aggregation
Services Router Modular Quality of Service Configuration Guide.
The Link Bundling feature supports these QoS features:
• hi priority /lo priority—Maximum bandwidth is calculated as a percentage of the bundle interface
bandwidth. This percentage is then applied to every member link on the egress, or to the local bundle
instance on ingress.
• guaranteed bandwidth—Provided in percentage and applied to every member link.
• traffic shaping—Provided in percentage and applied to every member link.
• WRED—Minimum and maximum parameters are converted to the right proportion per member link or
bundle instance, and then are applied to the bundle.
• marking—Process of changing the packet QoS level according to a policy.
• tail drop— Packets are dropped when the queue is full.
VLANs on an Ethernet Link Bundle
802.1Q VLAN subinterfaces can be configured on 802.3ad Ethernet link bundles. Keep this information in
mind when adding VLANs on an Ethernet link bundle:
• The maximum number of VLANs allowed per bundle is 4000.
• The maximum number of bundled VLANs allowed per router is 128000.
The memory requirement for bundle VLANs is slightly higher than standard physical interfaces.
Note
To create a VLAN subinterface on a bundle, include the VLAN subinterface instance with the interface
Bundle-Ether command:
interface Bundle-Ether instance.subinterface
After you create a VLAN on an Ethernet link bundle, all physical VLAN subinterface configuration is supported
on that link bundle.
Link Bundle Configuration Overview
These steps provide a general overview of the link bundle configuration process. Keep in mind that a link
must be cleared of all previous network layer configuration before it can be added to a bundle:
1. In global configuration mode, create a link bundle. To create an Ethernet link bundle, enter the interface
Bundle-Ether command.
2. Assign an IP address and subnet mask to the virtual interface using the ipv4 address command.
3. Add interfaces to the bundle you created in Step 1 with the bundle id command in the interface
configuration submode. You can add up to 32 links to a single bundle.
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
57
Configuring Link Bundles
VLANs on an Ethernet Link Bundle
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