fcoe fka-adv-period

Use fcoe fka-adv-period to set an FKA advertisement interval.

Use undo fcoe fka-adv-period to restore the default.

Syntax

fcoe fka-adv-period fka-adv-period

undo fcoe fka-adv-period

Default

The FKA advertisement interval is 8 seconds.

Views

System view

VLAN view

Predefined user roles

network-admin

Parameters

fka-adv-period: Specifies an FKA advertisement interval in the range of 4 to 600 seconds.

Usage guidelines

Only FCF, FCF-NPV, and NPV switches support this command. On FCF or NPV switches, you can set an FKA advertisement interval value only in system view. On FCF-NPV switches, you can set an FKA advertisement interval value only in VLAN view.

When setting the FKA advertisement interval on an FCF or NPV switch, use Table 15 as a reference to avoid service disruption.

Table 15: Recommended values for different application scenarios

Recommended value	Application scenarios	Remarks
Less than 90 seconds	Connected to servers, storage devices, or third-party switches.	According to FC-BB-5, the upper limit of the FKA advertisement interval is 90 seconds. In this scenario, a single-chassis IRF fabric of an FCF switch or NPV switch will experience FCoE traffic disruption during an ISSU reboot for the following reasons: The ISSU reboot takes more than 225 (2.5*90) seconds. The peer deletes the virtual link for failing to receive unsolicited Discovery Advertisements within 225 seconds. You must adjust the FKA advertisement interval on the upstream FCF switch to ensure service continuity in either of the following situations: A master/subordinate switchover on a multichassis IRF fabric of NPV switches. An ISSU reboot on a multichassis IRF fabric of NPV switches. The preceding steps are required for the following reasons: The FKA advertisement interval configured on the NPV switch affects only its VFC interfaces in F mode and connected ENodes. The VFC interfaces in NP mode of the NPV switch use the FKA advertisement interval learned from the upstream FCF switch.
60–90 seconds	Master/subordinate switchover on a multichassis IRF fabric takes more than 2.5 x 60 seconds because of the amount of FCoE configuration. ISSU reboot on a multichassis IRF fabric takes more than 2.5 x 60 seconds because of the amount of FCoE configuration.	For more information about ISSU, see Fundamentals Configuration Guide.
300–600 seconds	ISSU reboot on a single-chassis IRF fabric to which no nodes are attached.	During an ISSU reboot on a single-chassis IRF fabric, the switch cannot send unsolicited Discovery Advertisements or keepalive frames.

Recommended value

Application scenarios

Remarks

Less than 90 seconds

Connected to servers, storage devices, or third-party switches.

According to FC-BB-5, the upper limit of the FKA advertisement interval is 90 seconds. In this scenario, a single-chassis IRF fabric of an FCF switch or NPV switch will experience FCoE traffic disruption during an ISSU reboot for the following reasons:

The ISSU reboot takes more than 225 (2.5*90) seconds.
The peer deletes the virtual link for failing to receive unsolicited Discovery Advertisements within 225 seconds.

You must adjust the FKA advertisement interval on the upstream FCF switch to ensure service continuity in either of the following situations:

A master/subordinate switchover on a multichassis IRF fabric of NPV switches.
An ISSU reboot on a multichassis IRF fabric of NPV switches.

The preceding steps are required for the following reasons:

The FKA advertisement interval configured on the NPV switch affects only its VFC interfaces in F mode and connected ENodes.
The VFC interfaces in NP mode of the NPV switch use the FKA advertisement interval learned from the upstream FCF switch.

60–90 seconds

Master/subordinate switchover on a multichassis IRF fabric takes more than 2.5 x 60 seconds because of the amount of FCoE configuration.

ISSU reboot on a multichassis IRF fabric takes more than 2.5 x 60 seconds because of the amount of FCoE configuration.

For more information about ISSU, see Fundamentals Configuration Guide.

300–600 seconds

ISSU reboot on a single-chassis IRF fabric to which no nodes are attached.

During an ISSU reboot on a single-chassis IRF fabric, the switch cannot send unsolicited Discovery Advertisements or keepalive frames.

Examples

# Set the FKA advertisement interval to 20 seconds on an FCF or NPV switch.

<Sysname> system-view
[Sysname] fcoe fka-adv-period 20

# Set the FKA advertisement interval to 20 seconds in VLAN 2 on an FCF-NPV switch.

<Sysname> system-view
[Sysname] vlan 2
[Sysname-vlan2] fcoe fka-adv-period 20

prev	up	next
fcoe fcmap	home	fcoe global fcf-priority