Understanding Link Aggregation - Cisco ONS 15454 Software Feature And Configuration Manual

Configuring Link Aggregation
This chapter describes how to configure link aggregation for the ML-Series cards, both EtherChannel
and Packet-over-SONET/SDH [POS] channel. For additional information about the Cisco IOS
commands used in this chapter, refer to the Cisco IOS Command Reference publication. This chapter
contains the following major sections:
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Note You might have already configured bridging, and you may now proceed with configuring link
aggregation as an optional step. See
information.
The ML-Series does not support the routing of Subnetwork Access Protocol (SNAP) or Inter-Switch
Note
Link (ISL) encapsulated frames.

Understanding Link Aggregation

The ML-Series card offers both EtherChannel and POS channel. Traditionally EtherChannel is a
trunking technology that groups together multiple full-duplex 802.3 Ethernet interfaces to provide
fault-tolerant high-speed links between switches, routers, and servers. EtherChannel is a logical
aggregation of multiple Ethernet interfaces. EtherChannel forms a single higher bandwidth routing or
bridging endpoint. EtherChannel is designed primarily for host-to-switch connectivity. The ML-Series
card extends this link aggregation technology to bridged POS interfaces.
Cisco ONS 15454 SONET/SDH ML-Series Multilayer Ethernet Card Software Feature and Configuration Guide, R4.0
78-15224-02
Understanding Link Aggregation, page 9-1
Configuring EtherChannel, page 9-2
EtherChannel Configuration Example, page 9-3
Configuring POS Channel, page 9-4
POS Channel Configuration Example, page 9-5
Understanding Encapsulation over EtherChannel or POS Channel, page 9-7
Configuring Encapsulation over EtherChannel or POS Channel, page 9-7
Encapsulation over EtherChannel Example, page 9-8
Monitoring and Verifying EtherChannel and POS, page 9-10
C H A P T E R
Chapter 5, "Configuring Bridging"
9
for more general bridging
9-1