Manualshelf

Users Guide

ManualsBrandsDell ManualsAccess PlatformsPowerSwitch S4248FB-ON /S4248FBL-ON
641642643644645646647648649650
CM<vlanid> which matches the same <vlanid>. For example when vlanid 100 with a traffic class of type 4 the classmap created
will be:
classmap type qos CM100
match vlan 100
A single policymap is created to hold all the VLAN classmaps and its applied at the system qos level which gets applied to all the
interfaces.
policymap type qos PM_VLAN
class CM100
set qos-group 4
Any addition, deletion, or modification to the VLAN or the traffic class happens within the same policymap.
In the NPU, each classmap maps to an ACL entry in the L2QOS region matching the vlanid in the classmap.
Constraints
VLAN scaling is limited to the Fabric mode.
Currently Dynamic ARP Inspection (DAI) uses the vlan-group id. NAS implicitly programs the VLAN-group id in the Vlan table.
But DAI feature is not enabled in Fabric mode.
Use of vlan-group id is limited only to applications which require grouping for the purpose of using ACLs.
Anycast IP Gateway for VLANs
Anycast IP is a network addressing and routing method that allows for multiple devices to share the same IP address in a
network.
Starting with Release 10.5.2.0, you can configure anycast IP functionality for VLAN interfaces in a VLT domain. In earlier
releases, this feature was applicable only for the virtual-network interfaces. For more information, see Enable overlay routing
between virtual networks.
Anycast IP is a lightweight gateway router redundancy protocol that allows the hosts to use a virtual IP and a virtual MAC
address to forward traffic out of a VLT domain. You can configure virtual IP addresses on VLAN interfaces in addition to a
primary address, and the anycast gateway MAC address is configured to be the same on all the VLT switches. This configuration
allows devices to use a common IP address as their network gateway. The VLT domain-specific information is used to determine
the primary node, which responds to ARP requests for anycast IP. If the primary VLT node goes down, the secondary VLT node
owns the gateway IP addresses and starts responding to ARP requests.
648
Layer 2