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[Troubleshooting Series] Case 39 DCB configuration does not take effect

Latest reply: Feb 22, 2019 06:01:22 939 1 0 0 0


Physical Network Topology

As shown in the figure, two CE12800s are directly connected to the device. The QOS DCB is configured on both ends of the device. The device needs to perform DCB negotiation.

Figure 1-1 DCB configuration does not take effect

173510jk2ilv7sd9wticij.png

 

Fault Description

Check the status of DCB on device A and device B. The device DCB negotiation fails. The specific information is as follows:

[~SwitchA] display dcb
M:Manual;    A:Auto
-------------------------------------------------------------------------------
Interface         PFC Name     PFC Status  ETS Name    ETS Status App-Profile
-------------------------------------------------------------------------------
10GE1/0/1         default      ENABLE(A)   ets1        FAILED     -
------------------------------------------------------------------------------
[~SwitchB] display dcb
M:Manual;    A:Auto
-------------------------------------------------------------------------------
Interface         PFC Name     PFC Status  ETS Name    ETS Status App-Profile
-------------------------------------------------------------------------------
10GE2/0/1         default      ENABLE(A)   ets1        FAILED     -
------------------------------------------------------------------------------

Configuration Files

l   SwitchA

#
sysname SwitchA
#
dcb pfc default
#
dcb ets-profile ets1
priority-group 0 queue 0 to 2 4 to 6
priority-group 15 queue 7
priority-group 0 wfq weight 60
priority-group 1 wfq weight 40
#
lldp enable
#
interface 10GE1/0/1
port link-type trunk
port trunk allow-pass vlan 2094
lldp tlv-enable dcbx
dcb compliance intel-oui
dcb pfc enable mode auto
dcb ets enable ets1

l   SwitchB

#
sysname SwitchB
#
dcb pfc default
#
dcb ets-profile ets1
priority-group 0 queue 0 to 2 4 to 6
priority-group 15 queue 7
priority-group 0 wfq weight 60
priority-group 1 wfq weight 40
#
lldp enable
#
interface 10GE2/0/1
port link-type trunk
port trunk allow-pass vlan 2094
dcb pfc enable mode auto
dcb ets enable ets1

Troubleshooting Procedure

Run the display dcb fail-record command to check whether the current DCB parameters cannot be negotiated.

<~SwitchA> display dcb fail-record
DCB Fail-Record Show:
Interface           Fail-Record
-------------------------------------------------------------------------------
10GE1/0/1           [2012-08-21 10:59] OUI is not matched.

After the same negotiated version is configured on the device, it is found that the negotiation can be performed normally.

#
interface 10GE2/0/1
port link-type trunk
port trunk allow-pass vlan 2094
dcb pfc enable mode auto
dcb ets enable ets1
dcb compliance intel-oui

After the configuration is complete, the negotiation can be normal, as follows:

[~SwitchA] display dcb
M:Manual;    A:Auto
-------------------------------------------------------------------------------
Interface         PFC Name     PFC Status  ETS Name    ETS Status App-Profile
-------------------------------------------------------------------------------
10GE1/0/1         default      ENABLE(A)   ets1        SUCCEED     -
------------------------------------------------------------------------------
[~SwitchB] display dcb
M:Manual;    A:Auto
-------------------------------------------------------------------------------
Interface         PFC Name     PFC Status  ETS Name    ETS Status App-Profile
-------------------------------------------------------------------------------
10GE2/0/1         default      ENABLE(A)   ets1        SUCCEED     -
------------------------------------------------------------------------------

Root Cause

The DCBX versions of Device A and Device B are inconsistent. The DCB parameters of the two ends cannot be negotiated.

 


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sim_157
Created Feb 22, 2019 06:01:22

good sharing, helpful case
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