An environment consists of a Cisco MDS 9000 Series Switch that uses port channels. An engineer must ensure that frames between the source and the destination follow the same links for a specific…

The correct answer is A. src-id/dst-id. On Cisco MDS 9000, the 'src-id/dst-id' load balancing method uses the source port ID and destination port ID (FCID) as the hash key. This ensures that all frames belonging to a specific flow (same source and destination) are always hashed to the same link in the port channel…

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Question

An environment consists of a Cisco MDS 9000 Series Switch that uses port channels. An engineer must ensure that frames between the source and the destination follow the same links for a specific flow. Subsequent flows are allowed to use a different link Which load balancing method should be used to accomplish this goal?

Exhibit

Options

Asrc-id/dst-id
Bsrc-dst-oui
Csrc-dst-port
Dsrc-id/dst-id/oxid

How the community answered

(51 responses)

A
90% (46)
B
2% (1)
C
2% (1)
D
6% (3)

Explanation

On Cisco MDS 9000, the 'src-id/dst-id' load balancing method uses the source port ID and destination port ID (FCID) as the hash key. This ensures that all frames belonging to a specific flow (same source and destination) are always hashed to the same link in the port channel, satisfying the requirement that frames follow the same link for a given flow. Different source/destination pairs can hash to different links, allowing subsequent flows to use different links. The 'src-id/dst-id/oxid' method adds the Originator Exchange ID (OX_ID) to the hash, which can spread frames of the same conversation across multiple links - violating the requirement for same-link forwarding per flow.

Topics

#Fibre Channel#Cisco MDS#Port Channel#Load Balancing

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