Lenovo Flex System Fabric CN4093, Application Manual

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CN4093 Application Guide for N/OS 8.4
FCoE Connection Timeout
FCoE ‐ related ACLs and VLANs are added, changed, and removed as FCoE device
connection and disconnection are discovered. In addition, the administrator can
enable or disable automatic removal of ACLs and VLANs for FCFs and other FCoE
connections that timeout (fail or are disconnected) without FIP notification.
By default, automatic removal of ACLs upon timeout is enabled. To change this
function, use the following CLI command:
FCoE ACL Rules
When FIP Snooping is enabled on a port, the switch automatically installs the
appropriate ACLs to enforce the following rules for FCoE traffic:
 Ensure that FIP frames from ENodes may only be addressed to FCFs.
 Flag important FIP packets for switch processing.
 Ensure no end device uses an FCF MAC address as its source.
 Each FCoE port is assumed to be connected to an ENode and include
ENode ‐ specific ACLs installed, until the port is either detected or configured to
be connected to an external FCF.
 Ports that are configured to have FIP snooping disabled will not have any FIP or
FCoE related ACLs installed.
 Prevent transmission of all FCoE frames from an ENode prior to its successful
completion of login (FLOGI) to the FCF.
 After successful completion of FLOGI, ensure that the ENode uses only those
FCoE source addresses assigned to it by the FCF.
 After successful completion of FLOGI, ensure that all ENode FCoE source
addresses originate from or are destined to the appropriate ENode port.
 After successful completion of each FLOGI, ensure that FCoE frames may only
be addressed to the FCFs that accept them.
Initially, a basic set of FCoE ‐ related ACLs will be installed on all ports where FIP
snooping is enabled. As the switch encounters FIP frames and learns about FCFs
and ENodes that are attached or disconnect, ACLs are dynamically installed or
expanded to provide appropriate security.
When an FCoE connection logs out, or times out (if ACL timeout is enabled), the
related ACLs will be automatically removed.
FCoE ‐ related ACLs are independent of manually configured ACLs used for
regular Ethernet purposes. FCoE ACLs generally have a higher priority over
standard ACLs.
CN 4093(config)# [no] fcoe fips timeout-acl