Establishing fip snooping rules, Controlling forwarding of fcoe frames, Fip snooping configuration task list – H3C Technologies H3C S12500-X Series Switches User Manual

Page 32: Enabling fip snooping, Displaying and maintaining vfc interfaces and fip

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FIP snooping rules generated on an Ethernet interface operating in FCF mode are called FCF FIP

snooping rules.

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FIP snooping rules generated on an Ethernet interface operating in ENode mode are called ENode
FIP snooping rules.

Establishing FIP snooping rules

FIP snooping rules are established during the setup of a virtual link between an ENode and an FCF

switch. The following workflow is used to establish FIP snooping rules:

After receiving an unsolicited Discovery Advertisement from an FCF switch, the FCF-mode Ethernet
interface on the Transit switch generates an FCF FIP snooping rule based on the unsolicited

Discovery Advertisement and then forwards the unsolicited Discovery Advertisement to the ENode.
The FCF FIP snooping rule allows FCoE frames with the MAC address in the unsolicited Discovery

Advertisement (FCoE MAC address of the FCF switch) as the source MAC address and with the

FC-MAP value as the 24 most significant bits of the destination MAC address.

After receiving a Discovery Solicitation from the ENode on the ENode-mode Ethernet interface, the
Transit switch forwards it to the FCF switch through the FCF-mode Ethernet interface.

After receiving a FIP FLOGI request from the ENode on the ENode-mode Ethernet interface, the

Transit switch forwards it to the FCF switch through the FCF-mode Ethernet interface.

When forwarding the FLOGI LS_ACC packet from the FCF switch to the ENode, the ENode-mode
Ethernet interface obtains the FC address assigned by the FCF switch to the ENode and the FCoE

MAC address of the FCF switch, and then it generates an ENode FIP snooping rule. The ENode FIP

snooping rule allows FCoE frames with the FPMA (composed of FC-MAP as the 24 most significant

bits and FC address as the 24 least significant bits) as the source MAC address and with the FCoE
MAC address of the FCF switch as the destination MAC address.

FIP snooping rules exist as long as the virtual link is present, and they are deleted when you delete the

virtual link.

Controlling forwarding of FCoE frames

After establishing FIP snooping rules, a Transit switch forwards FCoE frames that match FIP snooping
rules and drops those that do not match FIP snooping rules to make sure only successfully registered

ENodes can communicate with FCF switches.

FIP snooping configuration task list

Tasks at a glance

Remarks

(Required.)

Enabling FIP snooping

Only Transit switches support FIP snooping.

(Required.)

Configuring the operating mode of an

Ethernet interface

N/A

(Optional.)