Aggregated Ethernet

You can configure aggregated Ethernet interfaces for CCC connections and for Layer 2 VPNs.

Aggregated Ethernet interfaces configured with VLAN tagging can be configured with multiple logical interfaces. The only encapsulation available for aggregated Ethernet logical interfaces is vlan-ccc. When you configure the vlan-id statement, you are limited to VLAN IDs 512 through 4094.

Aggregated Ethernet interfaces configured without VLAN tagging can be configured only with the ethernet-ccc encapsulation. All untagged Ethernet packets received are forwarded based on the CCC parameters.

To configure aggregated Ethernet interfaces for CCC connections, include the following statements:

interfaces {

    ae0 {

        encapsulation (ethernet-ccc | extended-vlan-ccc | vlan-ccc);

        vlan-tagging;

        aggregated-ether-options {

            minimum-links links;

            link-speed speed;

        }

        unit unit-number {

            encapsulation vlan-ccc;

            vlan-id identifier;

            family ccc;

        }

    }

}

Be aware of the following limitations when configuring CCC connections over aggregated Ethernet interfaces:

• If you configured load balancing between child links, be aware that a different hash key is used to distribute packets among the child links. Standard aggregated interfaces have family inet configured. An IPv4 hash key (based on the Layer 3 information) is used to distribute packets among the child links. A CCC connection over an aggregated Ethernet interface has family ccc configured instead. Instead of an IPv4 hash key, an MPLS hash key (based on the destination MAC address) is used to distributed packets among the child links.
• The extended-vlan-ccc encapsulation is not supported on the 12-port Fast Ethernet PIC and the 48-port Fast Ethernet PIC.
• The JUNOS software does not support the Link Aggregation Control Protocol (LACP) when an aggregated interface is configured as VLAN (with either the vlan-ccc or extended-vlan-ccc encapsulation). LACP can be configured only when the aggregated interface is configured with the ethernet-ccc encapsulation.

For more information about how to configure aggregated Ethernet interfaces, see the JUNOS Network Interfaces and Class of Service Configuration Guide.