3Com C36460T Tunnel Switching Between Different Tunnel Types, Ospf External Route Aggregation

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New Features and Feature Enhancements 11

Tunnel Switching Between Different Tunnel Types

So that tunnel switching between two sessions of different tunnel types can be easily implemented and maintained, Enterprise OS software version 11.4 has been re-structured to support tunnel switching from PPP over Ethernet (PPPoE) to PPTP, and from PPPoE to L2TP. Users can now dial-in through a PPPoE tunnel and “switch out” through a PPTP or L2TP tunnel. This enables the Enterprise OS device to have the flexibility of switching between tunnels of different tunnel types.

Routing Support Routing support features include OSPF External Route Aggregation, Protocol Features Independent Multicast-Sparse Mode (PIM-SM), Multicast Border Router (MBR),

IGMPv2 Enhancements, PPP over Ethernet (PPPoE), Virtual Router Redundancy Protocol (VRRP) for ATM Ethernet LAN Emulation, Virtual Router Redundancy Protocol (VRRP) for Virtual LAN (VLAN), Many-to-One NAT Enhancement, BGP-4 & IPv6 added to multiprotocol packages for OfficeConnect NETBuilder and SuperStack II NETBuilder SI, PathBuilder S400 devices, and RSVP and RSVP Proxy added to software packages for OfficeConnect NETBuilder and SuperStack II NETBuilder SI and PathBuilder S400 devices.

OSPF External Route Aggregation

With OSPF, the user can import routes from external routing sources (for example, BGP, RIP, static routes, and directly connected networks). These imported routes become OSPF external routes. In some networks, the number of external routes to be advertised can cause traffic congestion on the backbone and subsequently to all areas.

Because version 11.4 aggregates the type5 external routes, the user can define external route ranges. With user-defined external route ranges, if the external route is within the defined range, only then will the network be advertised. This reduces the number of external routes advertised in the backbone and regular areas.

Protocol Independent Multicast-Sparse Mode (PIM-SM)

The periodic broadcasting of information by DVMRP and MOSPF to identify the location of interested receivers for a specific multicast session is only useful in networks where bandwidth is plentiful or when there is a large number of senders and receivers for a multicast session. When senders and receivers to multicast sessions are distributed sparsely across a wide area such schemes are not efficient. They waste bandwidth on expensive WAN links and require the maintenance of “routing-state” on routers that are not on the forwarding tree for the multicast session. Protocol Independent Multicast-Sparse Mode (PIM-SM), implemented in 11.4, is an intra-domain multicast routing protocol designed to resolve some of the inadequacies with these other multicast protocols.

PIM-SM is “protocol independent” in that it can work with any unicast routing protocol. It builds a per-group (or per multicast session) shared multicast distribution tree centered at a rendezvous point, and requires receivers to explicitly join to this shared distribution tree prior to receiving data traffic. Since a “shared-tree” mechanism could result in suboptimal paths for data traffic from a source to the receivers of a multicast session, PIM-SM also supports the ability to switch to a source specific distribution tree if the data traffic warrants it. The implementation of PIM-SM supports IPv4 in this release (IPv6 is not supported in this release).

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Contents Enterprise OS Software Version 11.4 Release Notes 95052-8145 3Com CorporationBayfront Plaza Santa Clara, CaliforniaContents Appn Connections to 3174 through Token Ring IBM-Related Services in Token RingMaximum BSC Line Speed Shdlc Half-Duplex Mode Dial Idle TimerTotal Control Security and Accounting Server Availability Firmware Configuration Firmware UpdateMicrosoft Mppe Patches and Updates PM-SM Not Supported Over Nbma Media RouteDiscoveryToken Ring+ Modules Token Ring Auto Start-up Windows NT MS-CHAP Authentication Platform NotesRequirements Approved Dram SIMMs Enterprise OS Software Version 11.4 Release Notes OfficeConnect NETBuilder IP/IPX Router JW SuperStack II NETBuilder SIIP/IPX Router with 56-bit Encryption JE SuperStack FeaturesOfficeConnect NETBuilderIP Payload Compression Protocol IPComp or Ippcp Non-Broadcast, Multi-Access Nhrp for VPN TunnelsPublic-Key Infrastructure PKI Implementation Ospf External Route Aggregation Tunnel Switching Between Different Tunnel TypesProtocol Independent Multicast-Sparse Mode PIM-SM PPP over Ethernet PPPoE Multicast Border Router MBRIGMPv2 Enhancements 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 Web Link Enhancements Upgrade Utilities & Upgrade LinkVoice Over VPN VoVPN Performance Management Currently available statistics are Autotargeting for SLA Monitoring/Remote PollingAudit Log Messaging Enhancements Console Output in Telnet SessionsPKI Manager version Domain Name Use in FTP and Tftp CommandsSecure VPN Manager version Features of PKI Manager version Bridge/Router NETBuilder II Software FeaturesFeature Version 11.4 for the NETBuilder and PathBuilder platformsBritss Appn LNM LAA Module NETBuilder II Firmware RequirementsNETBuilder II Firmware Requirements Memory RequirementsNW-IP/IPX/AT Router AX-APPN/Connection ServicesPackages BF- Boundary 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 10/ST bridge/router RW-Multiprotocol RouterRE-Multiprotocol Router with 56-bit Encryption RS-Multiprotocol Router with 128-bit Encryption and 3DESSwitching/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 Ruuaix114.Z Solaris 2.5 platformsRuuhp114.Z HP-UX 10.x platformsProfile.bat Version 11.4 UpgradeUpgrade Manager ExecutingEtc/passwd. You must add an entry can be ignored EncryptionLicenseRead Environment VariableDLSw Bridge Static RoutesThrough Upgrade Link WindowResizing Appn Connections toNumber of DLSw Circuits DLSw CONNectUsage Parameter Default ChangeLeaf Node Sessions Support HPR and ISR Number of TCP ConnectionsFront-End Relay port isIBM-Related Feature Settings for Token Ring Ports 3Com Bridge/Routers and Supported Features Token Ring Frame Copy ErrorsFrame Copy Errors under LAN Net Manager Mode Service PointFrames ATM Emulated LANsATM LAN Emulation Clients and LargeHistory, the PPP link does not come up Ports in DCE ModeValue Lines Dial Idle TimerDisaster Recovery on Ports Without LeasedModem Supported Asynchronous ModemsSupported Synchronous Modem ModemsNotation Bootptab File Ascii BootBoot Cycle BootP ServerThan 8k to the policy These messages do not indicate a problem and can be ignoredScheduler Remote AccessRunOnBootFail 25bis Modem SetupVPN Protocols and Services Notes Page Memory Requirements Adequate Dram and Flash memory installed prior to shipmentOrder Numbers for Memory Upgrade Kits Platforms. The topics are presented in alphabetical order3Com-approved 20 MB Flash Memory Cards T3 Bandwidth LimitationSnmp Management BAud value to 16,000 or 4,000 to avoid this situation