Configure SPBM Layer 2 VSN

After you have configured the SPBM infrastructure, you can enable the SPBM Layer 2 Virtual Service Network (VSN) using the following procedure.

SPBM supports Layer 2 VSN functionality where customer VLANs (C-VLANs) are bridged over the SPBM core infrastructure.

At the BEBs, customer VLANs (C-VLAN) are mapped to I-SIDs based on the local service provisioning. Outgoing frames are encapsulated in a MAC-in-MAC header, and then forwarded across the core to the far-end BEB, which strips off the encapsulation and forwards the frame to the destination network based on the I-SID-to-C-VLAN provisioning.

Before you begin

  • You must configure the required SPBM and IS-IS infrastructure, which includes the creation of SPBM B-VLANs.

  • You must create the customer VLANs (C-VLANs) and add slots/ports.

Procedure

  1. In the navigation pane, expand Configuration > VLAN.
  2. Select VLANs.
  3. Select the Advanced tab.
  4. To map a C-VLAN to a Service instance identifier (I-SID), in the I-sid field, specify the I-SID to associate with the specified VLAN.
  5. Select Apply.
    Important

    Important

    • When a protocol VLAN is created, all ports are added to the VLAN including SPBM ports. To configure a protocol-based VLAN as a C-VLAN, you must first remove the SPBM-enabled ports from the protocol based VLAN, and then configure the protocol-based VLAN as a C-VLAN.

    • The switch reserves I-SID 0x00ffffff. The switch uses this I-SID to advertise the virtual B-MAC in an SMLT dual-homing environment. The platform clears the receive and transmit bit of this I-SID, therefore I-SID 0x00ffffff cannot be used for any other service.

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