Blocked path monitoring options

True Copy User Guide for VSP One Block
Version
10.5.x
Audience
anonymous
Part Number
MK-23VSP1B020-06
ft:lastEdition
2026-05-04

When multiple remote paths share a port, it is recommend that you set the same value of blocked path SIM monitoring time (time for watching SIMs reported when paths are blocked) for all remote paths.

When the connection destination of a remote path is a 25-Gbps Ethernet channel board, the DKCMAIN firmware of the connection source must support the connection of a 25-Gbps Ethernet channel board to the remote path. For this reason, even if the connection source is a 10-Gbps iSCSI channel board, do not downgrade the DKCMAIN firmware to a version that does not support the connection of a 25-Gbps Ethernet channel board to a remote path. If you do, the remote path is blocked.

The following table lists the setting items and their values, or supported functionalities for each transfer speed.

Setting item / supported functionality

25-Gbps Ethernet channel board

(VSP One B20 series) 10-Gbps iSCSI channel board

Blocked path monitoring time1

40 seconds3 (default)

Blocked path SIM monitoring time2

150 seconds5

70 seconds4 (default)

Setting for enabling/disabling header digest and data digest

Available

Not available

Default setting for header digest and data digest

Enabled

Enabled

Transfer speed of the connection target port

25 Gbps/10 Gbps

10 Gbps

Redundant configuration of the remote path

Required

Recommended
Note:
  1. You can specify the setting by running the raidcom modify remote_replica_opt command with the -path_blocked_watch option specified.
  2. You can specify the setting by running the raidcom modify remote_replica_opt or raidcom modify rcu command with the -path_blocked_watch_sim option specified.
  3. If you shorten the blocked path monitoring time, the path might be blocked due to a cause of delay in the network (such as spanning tree algorithm of switches).
  4. (VSP One B20 series) Use the default setting.
  5. (VSP One B20 series) When you use a 25-Gbps Ethernet channel board port on either side of a remote path, set a value that is appropriate for the 25-Gbps Ethernet channel board as the blocked path SIM monitoring time.