Lucent Technologies P220, P550R manual Vlan Issues, Configuring VLANs

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VLAN Issues

NOTE: If the Switch Port attribute Automatic VLAN Creation is set to Enabled, the Allow Learning attribute must also be set to Enabled.

Configuring VLANs

NOTES:

•In certain large configurations, the switch powers up very slowly.

•If you set a port’s VLAN trunking mode to Clear, make sure not to change the VLAN Binding Type from the default value: Static.

•If you are using both the VLAN auto-learning feature and the Binding Type Bind to Received or Bind to All, make sure that you set the binding type before you set Auto-learn to enable or else the port may not be automatically added to the VLAN.

Duplicate VLAN Error Message

NOTE: When you add a VLAN and then refresh your browser page, you may receive an error message stating that the VLAN name is already in use.

IEEE 802.1Q Packets

Problem: When a tagged IEEE 802.1Q packet arrives on a port that is “bind-to-all” and the VLAN does not exist on the switch, the packet is forwarded on to the VLAN assigned to the port default VLAN for that port.

Workaround: To prevent unintended forwarding of unknown VLAN traffic to the port default VLAN, configure the port default VLAN to the “discard” VLAN. However, please note that automatic VLAN creation will not work if the port default VLAN is the “discard” VLAN, because the switch does not learn for this VLAN.

Cajun P220, P550, P550R Switch Release Notes, Release 4.0.1

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Contents Software Release November Page Read Me First Overview New Features Additional Undocumented Features BOOTP/DHCP Relay GatewaySource Interface Determination BOOTP/DHCP Relay Gateway VlanProduct Binaries Product Binary FilesModule Descriptions InstallationDowngrading to a Previous Release Upgrading from Release 3.1 or Previous Releases Cajun P220, P550, P550R Switch Release Notes, Release Workarounds Problems and WorkaroundsCajun 48-Port 10/100 Media Module Command Line Interface Cajun DocServerFrames Transmitted with CRC Errors Front Panel DisplayHardware Hot Swap ModulesShort Cables May Cause Auto-negotiation Problems Loopback TestsM5520-TX Loopback Tests During Cold Start M5520-TX Auto-negotiation with Xircom Adapter CardsIntelligent Multicasting ExampleOspf Piggyback PortsSnmp Spanning TreeTime Zones PPP and TelnetDuplicate Vlan Error Message Ieee 802.1Q Packets Vlan IssuesConfiguring VLANs Functional Restrictions PingGigabit Ports Do Not Perform Auto-negotiation Hot Swapping ModulesWeb Configuration Setting the Spanning Tree ModeRedundant Controller Support Auto-NegotiationTftp Download Status Delay File Naming Standard for Embedded Nvram File SystemBug Fixes Buffering Commands Additional Undocumented CommandsBuffering Commands Mod-swport-spec Mod-swport-spec Mod-swport-spec switch portFabric-port-spec fabric port specifier Threshold 0,127,255 Dvmrp CommandsDvmrp Commands Igmp Commands IP CommandsIgmp Commands IP CommandsAddrif NamestaticIPX Commands IPX CommandsIpx max-service-entries Max-service-entriesDisabled BothinboundoutboundLdap Commands Ldap CommandsLogging Commands 10 Logging CommandsNo logging console No logging historyOspf Commands 11 Ospf CommandsNo logging shutdown No logging trapsPolicy Commands 12 Policy Commands65535 Port Commands 13 Port CommandsMod-swport-spec specifies Sample-intervalSnmp Commands Switch IP Commands14 Snmp Commands 15 Switch IP CommandsUrlip ip-addr System Commands16 System Commands UI Commands 17 UI CommandsIpx-network.next-hop
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