Configure an SPBM Layer 2 Switched UNI on an MLT

Shortest Path Bridging MAC (SPBM) supports Layer 2 Virtual Service Network (VSN) functionality where Switched UNIs are bridged over the SPBM core infrastructure.

Switched User Network Interface (S-UNI) allows the association of local endpoints to I-SIDs based on local port and VLAN together. With Switched UNI, the same VLAN can be used on one port to create an endpoint to one I-SID, and on another port to create an endpoint to another I-SID.

Before you begin

You must configure the required SPBM and IS-IS infrastructure.

About this task

To configure a Switched UNI on an MLT, you must create a Switched UNI I-SID, and map an MLT to the Switched UNI I-SID.

Note

When you configure Switched UNI, Spanning tree is disabled on all the Switched UNI ports.

Procedure

Enter MLT Interface Configuration mode:

enable

configure terminal

interface mlt <1-512>
Enable S-UNI on MLT:

flex-uni enable
Note

You cannot enable Switched UNI on EAPoL enabled interface.
Configure a Switched UNI Service Instance Identifier (I-SID):

i-sid <1–16777215> [elan]

This command automatically takes you to the ELAN I-SID Configuration mode.
Add an MLT to a Switched UNI I-SID:

c-vid <1-4094> mlt <1–512>

Note

You can run this command again to map a Switched UNI MLT to multiple I-SIDs.
Add untagged traffic to a Switched UNI I-SID:

untagged—traffic mlt <1–512> [bpdu enable]
Display the Switched UNI information:

show mlt i-sid

Example

Switch:1>enable
Switch:1#configure terminal
Switch:1(config)#mlt 10
Switch:1(config)#interface mlt 10
Switch:1(config-mlt)#flex-uni enable
Switch:1(config-mlt)#i-sid 100
Switch:1(elan:100)#c-vid 20 mlt 10
Switch:1(elan:100)#untagged-traffic mlt 10 bpdu enable
Switch:1(elan:100)#show mlt i-sid

================================================================================                                                                                     
                                    MLT Isid Info
================================================================================
             
		 ISID                  ISID                             ISID
MLTID IFINDEX ID      VLANID C-VID  TYPE     ORIGIN                  NAME         BPDU
--------------------------------------------------------------------------------
10    6153    100     N/A     20    ELAN      C  ---  -  ---  -      EXTR
11    6154    100     N/A     11    ELAN      C  ---  -  ---  -      ISID-100
--------------------------------------------------------------------------------

2 out of 2 Total Num of i-sid endpoints displayed

ORIGIN Legend:
C: manually configured; D: discovered by FA or EPT
M: FA management; E: discovered by EAP; A: auto-sense
l: discover by local switch  r: discover by remote VIST switch

Variable definitions

The following table defines parameters for the i-sid command to configure a Switched UNI.


Variable	Value
i-sid `<1-16777215>`	Specifies the service interface identifier (I-SID).
c-vid `<1-4094>`	Specifies the customer VLAN ID.
mlt `<1–512>`	Specifies the MLT ID.