Configuration Guide

Table Of Contents
©2021 Extreme Networks, Inc. All rights reserved
October 2021
47
o
Please note that only one adjacency is supported between a pair of SPB bridges (one
physical port or one MLT instance)
Enable IS-IS globally.
Configure IEEE 802.1ag (a.k.a CFM) in order to enable network connectivity troubleshooting
tools.
Verify basic SPB connectivity by checking the SBPM unicast-fib and the FDB entries for the B-
VLANs.
Verify basic SPB unicast connectivity using the l2ping and l2traceroute commands between all
the switches in the network for both the B-VLANs.
Verify that the path reported by the l2traceroute command is the same as the one calculated by
IS-IS (use the show isis spbm unicast-fib command).
SMLT Operation
ERS 8800 & VSP 7000 VSP 9000
Does not require you to configure C-VLANs on
the IST MLT.
Requires the inclusion of IST MLT in the C-
VLAN.
Traffic can pass between single-homed
VLANs attached to IST peers if the IST is
down.
Traffic cannot pass between single-homed
VLANs attached to IST peers if the IST is
down.
Decapsulates MAC-in-MAC traffic at the
primary BEB or secondary BEB irrespective of
whether the traffic is from the primary BVLAN
or secondary B-VLAN.
Decapsulates MAC-in-MAC traffic at the
primary BEB from the primary B-VLAN and
traffic at the secondary BEB from the
secondary B-VLAN.
Requires the IST to be up to pass traffic
between both IST switches for single-homed
VLANs.
vIST Operation
o
The vIST uses an SPBM tunnel to virtually connect two nodes that can be anywhere in
the SPBM network
o
A L2VSN is required for the vIST VLAN
An IP address is added to the VLAN as you would do with a normal IST VLAN
and you need to peer with the IP address to the neighboring IST switch
o
All C-VLANs must have an ISID
Before you add the SMLT MLT instance or SMLT port members to a C-VLAN, an ISID
must be assigned to the C-VLAN
If you try to add a C-VLAN to an SMLT MLT instance or port members that
become to an SMLT instance prior to adding an ISID to the VLAN, you will be
prompted with the following error message: Error: SMLT VLAN must have ISID
association.