Cisco Cisco Packet Data Interworking Function (PDIF) Guía Para Resolver Problemas
Configuring System Settings
▀ Configuring Link Aggregation
▄ Cisco ASR 5000 Series System Administration Guide
OL-22970-01
Configuring Link Aggregation
The four-port Quad Gigabit Ethernet line card (QGLC) developed for use in the ASR 5000 chassis supports link
aggregation as defined in IEEE 802.3ad. No other proprietary or non-standard modes are supported.
aggregation as defined in IEEE 802.3ad. No other proprietary or non-standard modes are supported.
Link aggregation (also called trunking or bonding) provides higher total bandwidth and better fault tolerance by
combining up to four parallel network links between devices as a single link. A large file is guaranteed to be sent over
one of the links, which removes the need to address out-of-order packets.
combining up to four parallel network links between devices as a single link. A large file is guaranteed to be sent over
one of the links, which removes the need to address out-of-order packets.
I
MPORTANT
:
The aggregated ports must be on the same QGLC redundant pair. Link aggregation does not work
across line card slots. In the event of a failure of one or more of the member physical ports, the remaining ports continue
to be aggregated.
to be aggregated.
I
MPORTANT
:
An aggregation group can consist of from one to four ports. A port can only be in one aggregation
group; for example, Port 3 can be in Group A linked to Switch 1, but it cannot simultaneously be in Group B linked to
Switch 2.
Switch 2.
Requirements
Observe the following requirements:
Assure that links between the two systems are full duplex and at the same speed.
Set the port medium configuration to auto or full duplex and maximum speed.
Certain physical port configuration changes, such as the MAC address or SRP, are prohibited on any interface
participating in link aggregation
There is more on configuring ports and port redundancy in ―Configuring Line Card and SPIO Port Redundancy.‖
Operation
Link aggregation operates as a sublayer between the MAC client and the MAC layer.
Each MAC passes received frames up for control or collection in an aggregator—a logical MAC that aggregates several
links together. The MAC client sends frames to the aggregator for distribution among MACs, as follows:
links together. The MAC client sends frames to the aggregator for distribution among MACs, as follows: