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TL-SG3428MP and VLAN mapping

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TL-SG3428MP and VLAN mapping

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Mr_John

2022-05-17 17:37:18 - last edited 2022-05-25 19:02:40

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TL-SG3428MP and VLAN mapping

2022-05-17 17:37:18 - last edited 2022-05-25 19:02:40

Model: TL-SG3428MP

Hardware Version: V4

Firmware Version: 4.0.0 Build 20210903 Rel.56410

I have next test stand

PC with vlan20 interface ------> ( port 3 ---- TL-SG3428 ---- port 1 ) <---- UPLINK switch

Next config

#
vlan 15
name "test15"

#
vlan 25
name "MGMT"

#
dot1q-tunnel
dot1q-tunnel mapping

#
interface gigabitEthernet 1/0/1
description "uplink"
switchport general allowed vlan 15,25 tagged
no switchport general allowed vlan 1
switchport dot1q-tunnel mode nni

#
interface gigabitEthernet 1/0/3
description "pc_test"
switchport general allowed vlan 15 tagged

no switchport general allowed vlan 1
switchport dot1q-tunnel mode uni

switchport dot1q-tunnel replace 20 15 "rep20_to15"

#
monitor session 1 source interface gigabitEthernet 1/0/1 both
monitor session 1 destination interface gigabitEthernet 1/0/24

(monitor session for Wireshark on another PC)

I see next situation:
When packet direction from PC to UPLINK
PC vlan20 ----> packet with tag 20 -----> TL-SG3428 replaced tag from 20 to 15 ----> packet with TAG 15 going to UPLINK ----->

When packet direction from UPLINK to PC

UPLINK switch -----> packet with TAG 15 -----> TL-SG3428 didn't replace tag 15 to 20 -----> packet still with TAG 15 going to PC ------>

What have I done wrong?

SW#show int swi g 1/0/3
Port Gi1/0/3:
PVID: 1
Acceptable frame type: All
Ingress Checking: Enable
Member in LAG: N/A
Link Type: General
Member in VLAN:
Vlan      Name                Egress-rule
----      -----------         -----------
15        test15              Tagged

SW#show mac address-table interface g 1/0/3

                    MAC Address Table
------------------------------------------------------------
MAC                VLAN    Port     Type            Aging
---                ----    ----     ----            -----
00:e0:4c:68:01:87 1       Gi1/0/3 dynamic         aging
00:e0:4c:68:01:87 15      Gi1/0/3 dynamic         aging

Total MAC Addresses for this criterion: 2

SW#show dot1q-tunnel
VLAN-VPN Mode: Enabled
Mapping Mode: Enabled

SW#show dot1q-tunnel interface
Port      Type      Tpid      Use Inner Priority Miss Drop           LAG
-------   -------   -------   ------------------ ------------------ ---
Gi1/0/1   NNI       0x8100    Disable             Disable             N/A
Gi1/0/2   NONE      0x8100    Disable             Disable             N/A
Gi1/0/3   UNI       0x8100    Disable             Disable             N/A
Gi1/0/4   NONE      0x8100    Disable             Disable             N/A
Gi1/0/5   NONE      0x8100    Disable             Disable             N/A

SW#show dot1q-tunnel mapping
Port                C-VLAN   SP-VLAN   Action      Name
--------------      ------   -------   ---------   -----------
Gi1/0/3             20       15        replace     rep20_to15

4 Reply

Somnus

LV5

2022-05-18 10:29:40

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Re:TL-SG3428MP and VLAN mapping

2022-05-18 10:29:40

@Mr_John Not sure if I understand you correctly. But from your cinfig I did see some thing strange.

1. I believe you are using VLAN VPN however VLAN VPN is not "replace" the VLAN Tag. It's actually "add" a Tag to the existing tagged package.

So your packet should be like this:

PC vlan20 ----> packet with tag 20 -----> TL-SG3428 ADD tag 15 to the packet (the packet with Tag 15 and inside the packet there is another Tag 20)----> packet with TAG 15 going to UPLINK

2. That means from Uplink to test PC packet should also contains two Tags. Outside VLAN 15 and inside VLAN20. If this packet doesn't have VLAN20 inside, the port won't able to transfer it correctly

3. The CLI command you used may not correct. I checked the CG, to set up TPID the command is (config-if)#switchport dot1q-tunnel tpid or switchport dot1q-tunnel mapping

You may refer to the CG. There is no "dot1q-tunnel replace" command for tplink switch

Mr_John

LV1

2022-05-19 13:09:23

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Re:TL-SG3428MP and VLAN mapping

2022-05-19 13:09:23

@Somnus

thank you for your replay

But in my case the main goal is

- CHANGE TAG 20 (from PC customer port) to TAG 15 (for my Service network) for packets from PC to Uplink

- CHANGE TAG 15 (from my Service network) to TAG 20 (for PC customer port) for packets from Uplink to PC

I have tested QinQ functional for add second tag and it is working fine and correct

And I have read documentation, but in docs I didn't see about "replace" command (may be it is undocumented functional)

I tried to config like in documentation (as you mentioned) in part about Flexible VLAN VPN but it doesn't work correct.

I will write about it a little bit later.

Fae

2022-05-23 06:58:19 - last edited 2022-05-25 19:02:40

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Re:TL-SG3428MP and VLAN mapping

2022-05-23 06:58:19 - last edited 2022-05-25 19:02:40

Dear @Mr_John,

Mr_John wrote

But in my case the main goal is

- CHANGE TAG 20 (from PC customer port) to TAG 15 (for my Service network) for packets from PC to Uplink

- CHANGE TAG 15 (from my Service network) to TAG 20 (for PC customer port) for packets from Uplink to PC

I have tested QinQ functional for add second tag and it is working fine and correct

And I have read documentation, but in docs I didn't see about "replace" command (may be it is undocumented functional)

Try adding the following config and check if it works for your case:

interface gigabitEthernet 1/0/3
  description "pc_test"
  switchport general allowed vlan 15 tagged
  no switchport general allowed vlan 1
  switchport dot1q-tunnel mode uni
  switchport dot1q-tunnel replace 20 15 "rep20_to15"

switchport dot1q-tunnel replace 15 20 "rep15_to20"

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Mr_John

LV1

2022-05-25 19:08:37

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Registered: 2022-05-17

Re:TL-SG3428MP and VLAN mapping

2022-05-25 19:08:37

@Fae

sorry , but I checked it again this config and it does not work correct ((

TL-SG3428MP and VLAN mapping

TL-SG3428MP and VLAN mapping

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