OS10 Enterprise Edition User Guide Release 10.4.0E(R3)

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iSCSI synchronization on VLT

An iSCSI session is considered to be learnt on VLT LAG during the following scenarios:

  • If the iSCSI session receives control packets, as login-request or login-response, on the VLT LAG.
  • If the iSCSI session does not receive control packets, but receives data packets on the VLT LAG. This happens when iSCSI session monitoring is enabled after the iSCSI session has started.

The information learnt about iSCSI sessions on VLT LAGs are synchronized with the VLT peers.

The synchronization of the iSCSI sessions happens based on various scenarios:
  • If the iSCSI login request is received on an interface that belongs to a VLT LAG, the information is synchronized with the VLT peer and the connection is associated with the interface.
  • Any additional updates to connections, including aging updates, that are learnt on VLT LAG members are synchronized with the VLT peer.
  • If the iSCSI login request is received on a non-VLT interface, followed by a response from a VLT interface, then the connection is associated with the VLT LAG interface and the information about the session is synchronized with the VLT peer.
  • When VLT interconnect comes up, information about iSCSI sessions learnt on VLT LAG is exchanged between the VLT-peers.

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