LAyer 2and layer 3 aggregation in ASR 9K series routers

[cisco6121]

Hi Friends,

I am new to ASR routers and started learning now. Please bear with my doubts if they are silly.

What does the below terms mean.

Layer 2 and Layer 3 Ethernet aggregation and Subscriber-aware broadband aggregation

Regards,

A

[smailmilak]

Hi,



Layer 2 and Layer 3 Ethernet Aggregation means that you can connect a bunch of U-PE devices on the A9K because of it's hardware capacities.

Subscriber-aware broadband aggreagation is probably PPPoE (xDSL) and IPoE subscriber termination.

[sbhadrav@cisco.com]

The optional Link Aggregation Control Protocol (LACP) is defined in the IEEE 802 standard. LACP
communicates between two directly connected systems (or peers) to verify the compatibility of bundle
members. For the Cisco ASR 9000 Series Router, the peer can be either another router or a switch.
LACP monitors the operational state of link bundles to ensure the following:
• All links terminate on the same two systems.
• Both systems consider the links to be part of the same bundle.
• All links have the appropriate settings on the peer.
LACP transmits frames containing the local port state and the local view of the partner system’s state.
These frames are analyzed to ensure both systems are in agreement.