Lenovo Flex System Fabric CN4093, Application Manual

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© Copyright Lenovo 2017 Chapter 17: FCoE and CEE
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Enabling and Disabling DCBX
When CEE is turned on, DCBX can be enabled and disabled on a per ‐ port basis,
using the following commands:
When DCBX is enabled on a port, Link Layer Detection Protocol (LLDP) is used to
exchange DCBX parameters between CEE peers. Also, the interval for LLDP
transmission time is set to one second for the first five initial LLDP transmissions,
after which it is returned to the administratively configured value. The minimum
delay between consecutive LLDP frames is also set to one second as a DCBX
default.
Peer Configuration Negotiation
CEE peer configuration negotiation can be set on a per ‐ port basis for a number of
CEE features. For each supported feature, the administrator can configure two
independent flags:
 The
advertise
flag
When this flag is set for a particular feature, the switch settings will be transmit
to the remote CEE peer. If the peer is capable of the feature, and willing to accept
the CN4093 settings, it will be automatically reconfigured to match the switch.
 The
willing
flag
Set this flag when required by the remote CEE peer for a particular feature as
part of DCBX signaling and support. Although some devices may also expect
this flag to indicate that the switch will accept overrides on feature settings, the
CN4093 retains its configured settings. As a result, the administrator should
configure the feature settings on the switch to match those expected by the
remote CEE peer.
These flags are available for the following CEE features:
 Application Protocol
DCBX exchanges information regarding FCoE and FIP snooping, including the
802.1p priority value used for FCoE traffic. The
advertise
flag is set or reset
using the following command:
The
willing
flag is set or reset using the following command:
CN 4093(config)# [no] cee port
<port alias or number>
dcbx enable
CN 4093(config)# [no] cee port
<port alias or number>
dcbx app_proto
advertise
CN 4093(config)# [no] cee port
<port alias or number>
dcbx app_proto willing