Cisco Cisco IOS Software Release 12.2(27)SBC
Link Aggregation Control Protocol (LACP) (802.3ad) for Gigabit Interfaces
Information About LACP (802.3ad) for Gigabit Interfaces
3
Cisco IOS Release 12.2(31)SB2
Features Supported on Gigabit EtherChannel Bundles
lists the features that are supported on Gigabit EtherChannel bundles on a PRE2 and PRE3.
LACP (802.3ad) for Gigabit Interfaces Configuration Overview
LACP is part of the IEEE specification 802.3ad that allows you to bundle several physical ports to form a
single logical channel. When you change the number of active bundled ports on a port channel, traffic
patterns will reflect the rebalanced state of the port channel.
single logical channel. When you change the number of active bundled ports on a port channel, traffic
patterns will reflect the rebalanced state of the port channel.
Understanding LACP (802.3ad) for Gigabit Interfaces Load Balancing
A Gigabit Ethernet port channel balances the traffic load across the links by reducing part of the binary
pattern formed from the addresses in the frame to a numerical value that selects one of the links in the
channel. Bundled ports equally inherit the logical MAC addresses on the port channel interface.
pattern formed from the addresses in the frame to a numerical value that selects one of the links in the
channel. Bundled ports equally inherit the logical MAC addresses on the port channel interface.
Understanding LACP (802.3ad) for Gigabit Interfaces Configuration
LACP supports the automatic creation of Gigabit Ethernet port channels by exchanging LACP packets
between ports. It learns the capabilities of port groups dynamically and informs the other ports. Once
LACP identifies correctly matched Ethernet links, it facilitates grouping the links into a Gigabit Ethernet
port channel.
between ports. It learns the capabilities of port groups dynamically and informs the other ports. Once
LACP identifies correctly matched Ethernet links, it facilitates grouping the links into a Gigabit Ethernet
port channel.
LACP packets are exchanged between ports in these modes:
Table 1
Gigabit EtherChannel Bundle Features
Cisco IOS Release
Feature
Bundle Interface
12.2(31)SB2
IP switching
Supported
IPv4: unicast and multicast
Supported
L2TP, GRE, IPinIP, AToM tunnels
Supported
All Ethernet routing protocols
Supported
Access control lists (ACLs) per bundle
Supported
Interface statistics
Supported
High availability beyond Route Processor
Redundancy Plus (RPR+)
Redundancy Plus (RPR+)
Not Supported
IPv6: unicast and multicast
Not Supported
Intelligent Service Gateway (ISG) IP sessions
Not Supported
MPLS (6PE)
Not Supported
Policy Based Routing (PBR)
Not Supported
PPPoX (PPPoEoE, PPPoEoQinQ, PPPoVLAN)
Not Supported
VLANs
Not Supported
Multicast VPN
Not Supported
VPN VRF
Not Supported