User's Manual

(host)(config) #ap wired-ap-profile default switchport trunk allowed vlan myallowedvlan
Adding a Bandwidth Contract to the VLAN
Bandwidth contracts on a VLAN can limit broadcast and multicast traffic. ArubaOS includes an internal
exception list to allow broadcast and multicast traffic using the VRRP, LACP, OSPF, PVST, and STP protocols. To
remove per-VLAN bandwidth contract limits on an additional broadcast or multicast protocol, add the MAC
address for that broadcast/multicast protocol to the VLAN Bandwidth Contracts MAC Exception List.
The command in the example below adds the MAC address for CDP (Cisco Discovery Protocol) and VTP (Virtual
Trunking Protocol to the list of protocols that are not limited by VLAN bandwidth contracts.
(host)(config) #vlan-bwcontract-explist mac 01:00:0C:CC:CC:CC
To show entries in the VLAN bandwidth contracts MAC exception list, use the
show vlan-bwcontract-explist [internal]command:
(host)(config) #show vlan-bwcontract-explist internal
VLAN BW Contracts Internal MAC Exception List
---------------------------------------------
MAC address
-----------
01:80:C2:00:00:00
01:00:0C:CC:CC:CD
01:80:C2:00:00:02
01:00:5E:00:82:11
Optimizing VLAN Broadcast and Multicast Traffic
Broadcast and Multicast (BCMC) traffic from APs, remote APs, or distributions terminating on the same VLAN
floods all VLAN member ports. This causes critical bandwidth wastage, especially when the APs are connected
to an L3 cloud where the available bandwidth is limited or expensive. Suppressing the VLAN BCMC traffic to
prevent flooding can result in loss of client connectivity.
To effectively prevent flooding of BCMC traffic on all VLAN member ports, use the bcmc-optimization
parameter under the interface vlan command. This parameter ensures controlled flooding of BCMC traffic
without compromising the client connectivity. This option is disabled by default. You must enable this
parameter for the controlled flooding of BCMC traffic.
If you enable BCMC Optimization on uplink ports, the controller-generated Layer-2 packets will be dropped.
The bcmc-optimization parameter has the following exemptions:
l All DHCP traffic will continue to flood VLAN member ports even if you enable the bcmc-optimization
parameter.
l ARP broadcasts and VRRP (multicast) traffic will still be allowed.
You can configure BCMC optimization using the CLI or WebUI.
Using the CLI
(host)(config) #interface vlan 1
(host)(config-subif)#bcmc-optimization
(host)(config-subif)#show interface vlan 1
VLAN1 is up line protocol is up
Hardware is CPU Interface, Interface address is 00:0B:86:61:5B:98 (bia 00:0B:86:61:5B:98)
Description: 802.1Q VLAN
Dell Networking W-Series ArubaOS 6.4.x | User Guide Network Configuration Parameters | 154