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Flooded packets on all VLANs are received on a server

Symptom: All packets flooded on all VLANs on an Aggregator are received on a server, even if the server

is configured as a member of only a subset of VLANs. This behavior happens because all Aggregator ports

are, by default, members of all (4094) VLANs.

Resolution: Configure a port that is connected to the server with restricted VLAN membership.

Steps to Take:

1. Display the current port mode for Aggregator L2 interfaces (show interfaces switchport interface

command)..

Dell#show interfaces switchport tengigabitethernet 0/1

Codes: U - Untagged, T - Tagged

x - Dot1x untagged, X - Dot1x tagged

G - GVRP tagged, M - Trunk, H - VSN tagged

i - Internal untagged, I - Internal tagged, v - VLT untagged, V -

VLT tagged

Name: TenGigabitEthernet 0/1

802.1QTagged: Hybrid

SMUX port mode: Auto VLANs enabled

Vlan membership:

Q Vlans

U 1

T 2-4094

Native VlanId: 1

2. Assign the port to a specified group of VLANs (vlan tagged command) and re-display the port mode

status..

Dell(conf)#interface tengigabitethernet 0/1

Dell(conf-if-te-0/1)#vlan tagged 2-5,100,4010

Dell(conf-if-te-0/1)#