Design Reference

Table Of Contents

• The current release uses Level 1 IS-IS. The current release does not support Level 2 IS-IS.

The ACLI command show isis int-l2-contl-pkts is not supported in the current

release because the IEEE 802.1aq standard currently only defines the use of one hierarchy,

Level 1.

• The IS-IS standard defines wide (32-bit ) metrics and narrow (8-bits) metrics. The current

release supports the wide metric.

Pay special attention to the expected scaling of routes in the network when you select configuration

values for the

isis l1-hello-interval and isis l1-hello-multiplier commands on IS-

IS interfaces. The default values for these commands work well for most networks, including those

using moderately scaled routes. In highly scaled networks, you may need to configure higher values

for these commands.

VLACP

VLACP is generally used when a repeater or switch exists between connected VSP 4000 switches

to detect when a connection is not operational even when the link LED is lit.

SNMP traps

On each SPBM peer, if you configure the SPBM B-VLANs to use different VLAN IDs, for example,

VLAN 10 and 20 on one switch, and VLAN 30 and 40 on the second, the system does not generate

a trap message to alert of the mismatch because the two switches cannot receive control packets

from one another. Configure the SPBM B-VLANs to use matching VLAN IDs.

I-SID filters

The current release does not support I-SID filters.