Dcbx Example - Dell S4820T Configuration Manual

Expected PFC 1
Priority
To configure the aforementioned DSCP and PFC priority values, perform the following tasks:
1. Create class-maps to group the DSCP subsets
class-map match-any dscp-pfc-1
match ip dscp 0-5,10-15
!
class-map match-any dscp-pfc-2
match ip dscp 20-25,30-35
2. Associate above class-maps to Queues Queue assignment to be based on the below table .
Table 15.
Internal- 0
priority
Queue 1
3. Dot1p->Queue Mapping Configuration is retained at the default value.
Default dot1p-queue mapping is,
Dell#show qos dot1p-queue-mapping
Dot1p Priority : 0
4. Interface Configurations on server connected ports.
a. Enable DCB globally.
Dell(conf)#dcb enable
b. Apply PFC Priority configuration. Configure priorities on which PFC is enabled.
Dell(conf-if-te-1/1)#pfc priority 1,2

DCBx Example

The following figure shows how to use DCBx.
The external 40GbE 40GbE ports on the base module (ports 33 and 37) of two switches are used for
uplinks configured as DCBx auto-upstream ports. The device is connected to third-party, top-of-rack
(ToR) switches through 40GbE uplinks. The ToR switches are part of a Fibre Channel storage network.
The internal ports (ports 1-32) connected to the 10GbE backplane are configured as auto-downstream
ports.
On the S4820T, PFC and ETS use DCBx to exchange link-level configuration with DCBx peer devices.
Data Center Bridging (DCB)
2
1 2
2 0
1 2 3 4
Queue :2 0 1 3
3 4
3 4
5 6 7
4 5 6 7
5 6 7
5 6 7
289