Lenovo Flex System Fabric CN4093, Application Manual

Page: 342 / 634

342
CN4093 Application Guide for N/OS 8.4
Limitations

Enterprise NOS supports ISL distance up to 3 kms.

E ‐ ports can be configured only on Lenovo Flex System Fabric CN4093 10 Gb
Converged Scalable Switch and Lenovo RackSwitch G8264CS. E ‐ ports cannot
interoperate with the switches from other vendors.

A maximum of eight switches are supported in a Fibre Channel fabric.

A maximum of four E ‐ ports can be configured on a switch.
Optimized FCoE Traffic Flow
To optimize FCoE traffic flow between FCoE enodes, optimized ‐ forwarding
feature installs appropriate ACL entries for logged ‐ in nodes. Usually, any FC/FCoE
traffic in full fabric mode should go through FC module for Zone check. We can
achieve low latency if the Zone check is done on Ethernet switch module for
FCoE ‐ FCoE traffic. Optimized feature is enabled by default in Full fabric mode,
and is not applicable to NPV mode.
Note:
FCoE ‐ FC and FC ‐ FC traffic is not optimized.
If needed, the administrator can disable optimized ‐ forwarding feature. Prior to
that, disable FIP snooping. Use the following commands:
To re ‐ enable optimized ‐ forwarding feature, use the following command sequence:
To view optimized traffic flow information, use the following commands:
CN 4093(config)# no fcoe fips enable
CN 4093(config)# no fcoe optimized-forwarding enable
CN 4093(config)# no fcoe fips enable
CN 4093(config)# fcoe optimized-forwarding enable
CN 4093(config)# fcoe fips enable
CN 4093(config)# show fcoe optimized-forwarding status
(Show current state of feature)
CN 4093(config)# show fcoe optimized-acls vlan
<vlan ID>
(Show list of optimized ACLs)