3Com C36460T, 86-0621-000 Virtual Router Redundancy Protocol Vrrp for Virtual LAN Vlan

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New Features and Feature Enhancements 13

■Provides end users with ease of installation and configuration; no special configuration of the PC or modem is needed.

■Provides services providers with ease of provisioning, services, and management.

■Operates independent of access device (that is, works for xDSL, cable, or wireless devices) which shields end users from the need to learn complicated technologies (for example, ATM).

■Preserves the applications that have been built around Microsoft Windows Dial-Up Networking (DUN). A simple PPPoE client driver is used with an interface and functionality familiar to the user.

Virtual Router Redundancy Protocol (VRRP) for ATM Ethernet LAN Emulation

In addition to supporting Virtual Router Redundancy Protocol (VRRP) on Enterprise OS platforms with Ethernet, Fiber Distributed Data Interface (FDDI), and Token Ring interfaces, 11.4 now supports ATM Ethernet LAN Emulation (ATM LANE).

LANE operates by maintaining a set of mappings from MAC addresses to ATM addresses. When running VRRP on a LANE network, the LANE protocol must be notified when a new master router is elected so that it can update the MAC address to ATM address mapping within the ELAN for the virtual router's MAC address. In essence, while running VRRP over LANE, a virtual MAC address may change location from one LEC to another.

For more information regarding VRRP, consult the Internet Drafts for VRRP (draft-ietf-vrrp-spec-v2-03.txt) and VRRP Operation over ATM LAN Emulation (draft-ietf-vrrp-lane-01.txt).

Virtual Router Redundancy Protocol (VRRP) for Virtual LAN (VLAN)

In addition to supporting Virtual Router Redundancy Protocol (VRRP) over a physical LAN, with 11.4 comes support for VRRP for the Virtual LAN (VLAN).

A VLAN can be seen as a group of end-stations, perhaps on multiple physical LAN segments that are not constrained by their physical location and can communicate as if they were on a common LAN. With VRRP for VLAN, network operation is ensured since dynamic responsibility for a virtual router is transmitted to one of the VRRP routers on a VLAN.

When VRRP is used over a physical LAN, an owner of the Virtual Router ID (VRID) may change the MAC address to the Virtual MAC (VMAC) address without transitioning to promiscuous mode. For the VLAN implementation, when a VRRP router becomes the master (the router that is forwarding the virtual IP packets), the VLAN interface will always be in promiscuous mode.

Many-to-One NAT Enhancement

When executing large file transfers with a block size that is greater than the underlying media can handle, IP will fragment the UDP packet. Since only the first fragment contains the UDP header (which indicates the source and destination port required by NAT to map to a NAT IP address), the subsequent fragmented packets do not contain the UDP header. This results in NAT not having the UDP ports to map to the NAT IP address. In previous releases, this condition would

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Contents Enterprise OS Software Version 11.4 Release Notes Bayfront Plaza 3Com CorporationSanta Clara, California 95052-8145Contents Maximum BSC Line Speed Shdlc Half-Duplex Mode IBM-Related Services in Token RingDial Idle Timer Appn Connections to 3174 through Token RingMicrosoft Mppe Patches and Updates Firmware Configuration Firmware UpdatePM-SM Not Supported Over Nbma Media RouteDiscovery Total Control Security and Accounting Server AvailabilityRequirements Approved Dram SIMMs Windows NT MS-CHAP Authentication Platform NotesToken Ring+ Modules Token Ring Auto Start-up Enterprise OS Software Version 11.4 Release Notes IP/IPX Router with 56-bit Encryption JE SuperStack II NETBuilder SIOfficeConnect NETBuilder IP/IPX Router JW OfficeConnect FeaturesNETBuilder SuperStackPublic-Key Infrastructure PKI Implementation Non-Broadcast, Multi-Access Nhrp for VPN TunnelsIP Payload Compression Protocol IPComp or Ippcp Protocol Independent Multicast-Sparse Mode PIM-SM Tunnel Switching Between Different Tunnel TypesOspf External Route Aggregation IGMPv2 Enhancements Multicast Border Router MBRPPP over Ethernet PPPoE Many-to-One NAT Enhancement Virtual Router Redundancy Protocol Vrrp for Virtual LAN VlanBandwidth on Demand with Incoming Traffic IP Quality of Service IPQoSNew Features and Feature Enhancements Class-Based Queuing CBQ Management Voice Over Frame Relay VoFR Voice Over VPN VoVPN Upgrade Utilities & Upgrade LinkWeb Link Enhancements Performance Management Currently available statistics are Autotargeting for SLA Monitoring/Remote PollingAudit Log Messaging Enhancements Console Output in Telnet SessionsSecure VPN Manager version Domain Name Use in FTP and Tftp CommandsPKI Manager version Features of PKI Manager version Feature NETBuilder II Software FeaturesVersion 11.4 for the NETBuilder and PathBuilder platforms Bridge/RouterBritss Appn LNM LAA NETBuilder II Firmware Requirements NETBuilder II Firmware RequirementsMemory Requirements ModulePackages AX-APPN/Connection ServicesBF- Boundary Router NW-IP/IPX/AT RouterDlsw 16 MB 24 MB Software Package Feature PathBuilder S5xx Series Switches Software FeaturesLNM LAA Switch PPTP/L2TP R2R, VLL PathBuilder S400 Series Switches Software Features Britss Appn LNM LAA 16 MB For Dual Images Bridge/RoutersIsdn BRI Isdn PRI Isdn T1/E1 Isdn CT1/CE1 Isdn T3/E3 OfficeConnect NETBuilder Bridge/Router Software FeaturesVirtual Ports Restricted Number of Dhcp 256 Addresses RE-Multiprotocol Router with 56-bit Encryption RW-Multiprotocol RouterRS-Multiprotocol Router with 128-bit Encryption and 3DES 10/ST bridge/routerSwitching/Tunneling WANExtender MP6E Module Fast Ethernet 100Base ATM Module/ Lane Software Package CF for TE for Feature Model SuperStack II NETBuilder Token Ring Software FeaturesSmds Memory Requirements Ruuhp114.Z Solaris 2.5 platformsHP-UX 10.x platforms Ruuaix114.ZUpgrade Manager Version 11.4 UpgradeExecuting Profile.batEtc/passwd. You must add an entry can be ignored EncryptionLicenseRead Environment VariableDLSw Bridge Static RoutesResizing Upgrade Link WindowAppn Connections to ThroughLeaf Node Sessions Support DLSw CONNectUsage Parameter Default ChangeNumber of DLSw Circuits Front-End Number of TCP ConnectionsRelay port is HPR and ISRIBM-Related Feature Settings for Token Ring Ports Frame Copy Errors under LAN Net Manager Token Ring Frame Copy Errors3Com Bridge/Routers and Supported Features Mode Service PointATM LAN Emulation ATM Emulated LANsClients and Large FramesValue Ports in DCE ModeHistory, the PPP link does not come up Disaster Recovery on Dial Idle TimerPorts Without Leased LinesSupported Synchronous Modem Supported Asynchronous ModemsModems ModemNotation Boot Cycle Ascii BootBootP Server Bootptab FileThan 8k to the policy These messages do not indicate a problem and can be ignoredRunOnBootFail Remote Access25bis Modem Setup SchedulerVPN Protocols and Services Notes Page Order Numbers for Memory Upgrade Kits Adequate Dram and Flash memory installed prior to shipmentPlatforms. The topics are presented in alphabetical order Memory RequirementsSnmp Management T3 Bandwidth LimitationBAud value to 16,000 or 4,000 to avoid this situation 3Com-approved 20 MB Flash Memory Cards
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