Руководство По Проектированию для Cisco Cisco Nexus 5010 Switch

Design Guide

Figure 3.

Example of Teaming Configuration

Teaming with PortChannels

Some terminology differs from vendor to vendor. For example, Intel uses the following terminology:

●

Static link aggregation:

In Cisco terminology, this is a static PortChannel (EtherChannel): channel-group

mode on

●

Dynamic link aggregation:

In Cisco terminology, this is a dynamic PortChannel (EtherChannel): channel-

group mode active

For PortChannels, HP NCU uses this terminology:

●

Switch-assisted load balancing:

In Cisco terminology, this is a static PortChannel (EtherChannel): channel-

group mode on

●

IEEE 802.3ad dynamic:

In Cisco terminology, this is a dynamic PortChannel (EtherChannel): channel-group

mode active

Additional teaming capabilities include the following:

●

Capability to define VLANs:

Each additional VLAN on an adapter is presented to the OS as an individual

local-area connection.

●

Capability to define a VLAN on top of a teamed adapter:

This option enables redundant connectivity from

the server to the network and creation of a virtual network adapter on every VLAN.

Transmit Load Balancing

Transmit load balancing (TLB) can be used when the upstream switches do not support vPC. It has the peculiar
behavior of using multiple links for sending and only one link for receiving.

This behavior can be seen in the MAC address table of the two switches to which a server configured in this manner
is connected. As you can see, the server uses two different MAC addresses for sending traffic, and the ARP table of
the router learns only one of the two MAC addresses:

tc-nexus7k01-vdc2# show ip arp vlan 60

IP ARP Table

Total number of entries: 3

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