[Edgecore SONiC] VLAN & Inter-VLAN Routing Follow

Basic VLAN configuration and internal VLAN routing.

• VLAN tag and untag settings
• Inter-Vlan routing

• Switch model name:

  AS7726-32X, AS7326-56X, AS7816-64X, AS5835-54X(T), AS4630-54PE, AS9716-32D, AS8000(Minipack), Wedge100BF-32X

• Edgecore SONiC version:

  • Edgecore-SONiC_20201123_130028_ec202006_74

  • Edgecore-SONiC_20201229_070315_ec202006_101

  • Edgecore-SONiC_20201229_070315_ec202006_bfn_65(Wedge100BF-32X)

Restriction

• Unexpected situations will appear when VLANs are configured on the router port.
• Support 4K VLANs.

Steps 1. Make sure that the port configuration of the VLAN member is not a router port. If the port is configured as a VLAN member of a router port, you will get the following error:

admin@sonic:~$ sudo config vlan member add 1 Ethernet48
Usage: config vlan member add [OPTIONS]  
Try "config vlan member add -h" for help.

Error: Ethernet48 is a L3 interface!

Note. If you face the same error message, you should use the command "sudo config interface ip remove Ethernet48 [IP Address]" to remove IP on the interface. (Detail command information, you can refer to the CLI guide)

Steps 2. Create VLAN1 and VLAN2 on the switch

admin@sonic:~$ sudo config vlan add 1       
admin@sonic:~$ sudo config vlan add 2

Steps 3. Let the Ethernet48 as VLAN1 untag member.

admin@sonic:~$ sudo config vlan member add -u 1 Ethernet48

Steps 4. Let the Ethernet52 as VLAN2 tag member.

admin@sonic:~$ sudo config vlan member add 2 Ethernet52

• Check the VLAN setting by command “show vlan brief” or “show vlan config”

admin@sonic:~$ show vlan brief     
+-----------+----------------+------------+----------------+-----------------------+    
|   VLAN ID | IP Address     | Ports      | Port Tagging   | DHCP Helper Address   |    
+===========+================+============+================+=======================+    
|         1 |                | Ethernet48 | untagged       |                       |    
+-----------+----------------+------------+----------------+-----------------------+    
|         2 |                | Ethernet52 | tagged         |                       |    
+-----------+----------------+------------+----------------+-----------------------+
admin@sonic:~$ show vlan config
Name VID Member Mode
------ ----- ---------- --------
Vlan1 1 Ethernet48 untagged
Vlan2 2 Ethernet52 tagged

Caution: If the VLAN has no members, the command "show vlan config" is skipped and the VLAN information is displayed as follows:

admin@sonic:~$ show vlan brief
+-----------+--------------+------------+----------------+-----------------------+
|   VLAN ID | IP Address   | Ports      | Port Tagging   | DHCP Helper Address   |
+===========+==============+============+================+=======================+
|         1 |              | Ethernet48 | untagged       |                       |
+-----------+--------------+------------+----------------+-----------------------+
|         2 |              |            |                |                       |
+-----------+--------------+------------+----------------+-----------------------+
admin@sonic:~$ show vlan config
Name      VID  Member      Mode
------  -----  ----------  --------
Vlan1       1  Ethernet48  untagged

• Check the native VLAN (PVID)

admin@sonic:~$ sudo bridge vlan
port    vlan ids
docker0  1 PVID Egress Untagged

Ethernet48   1 PVID Egress Untagged

Ethernet52   2

Bridge   1
         2

dummy    1 PVID Egress Untagged

Steps 1. Configure IP addresses on VLAN1 and VLAN2

admin@sonic:~$ sudo config interface ip add Vlan1 192.168.1.2/24       
admin@sonic:~$ sudo config interface ip add Vlan2 192.168.2.1/24

Caution: Vlan1 and Vlan2 are the Names of the VLAN interface. So, “V” must be capital.

• Check the VLAN setting and IP addresses

admin@sonic:~$ show vlan brief     
+-----------+----------------+------------+----------------+-----------------------+    
|   VLAN ID | IP Address     | Ports      | Port Tagging   | DHCP Helper Address   |    
+===========+================+============+================+=======================+    
|         1 | 192.168.1.2/24 | Ethernet48 | untagged       |                       |    
+-----------+----------------+------------+----------------+-----------------------+    
|         2 | 192.168.2.1/24 | Ethernet52 | tagged         |                       |    
+-----------+----------------+------------+----------------+-----------------------+

admin@sonic:~$ show ip interfaces
Interface    Master    IPv4 address/mask    Pri/Sec    Admin/Oper    BGP Neighbor    Neighbor IP
-----------  --------  -------------------  ---------  ------------  --------------  -------------
Vlan1                  192.168.1.2/24       Primary    up/up         N/A             N/A
Vlan2                  192.168.2.1/24       Primary    up/up         N/A             N/A
docker0                240.127.1.1/24       Primary    up/down       N/A             N/A
eth0                   188.188.97.28/16     Primary    up/up         N/A             N/A
lo                     127.0.0.1/8          Primary    up/up         N/A             N/A

• Check the routing table.

admin@sonic:~$ show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR, f - OpenFabric,
       > - selected route, * - FIB route, q - queued route, r - rejected route

C>* 192.168.1.0/24 is directly connected, Vlan1, 00:01:57
C>* 192.168.2.0/24 is directly connected, Vlan2, 00:02:02

• Content about VLAN in /etc/sonic/config_db.json

admin@sonic:/etc/sonic$ sudo vi config_db.json
{

    ...
    "VLAN_INTERFACE": {
        "Vlan1": {},
        "Vlan2": {},
        "Vlan1|192.168.1.2/24": {},
        "Vlan2|192.168.2.1/24": {}
    },
    "VLAN_MEMBER": {
        "Vlan1|Ethernet48": {
            "tagging_mode": "untagged"
        },
        "Vlan2|Ethernet52": {
            "tagging_mode": "tagged"
        }
    }, 
    ...
}