Debugging Tenant Traffic

This chapter contains the following sections:

Debugging Tenant Traffic

To verify the VLAN to VN-Segment mapping use the show platform fwm info vdc all verbose | begin fwm_avl_vlan_tree_by_vni command.

To verify the if programming works fine, use the show platform fwm info qinq-xlate-table <asic-num> command as this will show the mapping from the internal VLAN to VN-Segment mapping and vice-versa.

The following example shows how to verify that both the VLAN and QinQ values are pointing to the same internal VLAN: 
switch# show platform fwm info  xlate-vlan-table  1 | grep " 200 "
Dir  Xlate-idx Key-vlan Res-vlan Ref-count Masked Location     is_l2_if
Ig   17        200      199      1         no     1.784.0     1
Eg   17        199      200      1         no     1.3262.0    1


switch# show platform fwm info qinq-xlate-table  1  | grep “ 200 "
Number of xlate containers pending PSS: 0
Dir  Xlate-idx Key-vlan Res-vlan Ref-count Masked Location     is_l2_if
Eg   17        199      20000    1         no     1.3024.0     1
Ig   17        20000    199      1         no     1.3189.0     1

For certain VLAN and VN-Segment mapping, the VLAN is seen from the server-side and hence it is xlate-vlan-table and QinQ is seen from the fabric-side and hence it is qinq-xlate-table.

In the above example of xlate-vlan-table, 'Res-vlan' in the Ig direction is the internal context that ASIC uses to forward server traffic of a tenant. In the CLI output of qinq-xlate-table, 'Res-vlan' in the Ig direction is the forwarding context that ASIC uses to forward FabricPath traffic of a tenant. It is required that, for a VLAN with VN-Segment, both the VLAN in the Ig direction and VN-Segment in the Ig direction should point to the same 'Res-vlan'.

The following example shows how to determine the ASIC number: 
switch# show platform fwm info  pif  ethernet 1/1 | grep asic
Eth1/1 pd: slot 0  logical port num 0  slot_asic_num 1  global_asic_num 1 fw_ins t 0  phy_fw_inst 0 fc 0

The global_asic_num value is 1 for ethernet 1/1 in the above example.


Note

The VLAN and VN-Segment programming will be global and will be programmed symmetrically in all the ASICs.