3Com 2500 - Manual

3Com 2500

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Table of Contents:

  • Page 3 – ONTENTS; LAN; II; VLAN; Types of VLANs 2-1
  • Page 4 – Modifying the Default VLAN 2-5; ART; III; BOUT; Bridging and Routing Models 3-4; IP T; Forwarding to Nodes within an LIS 4-11
  • Page 5 – IP M; ULTICAST; IPX
  • Page 6 – IV; DMINISTERING
  • Page 7 – Administering Multicast Tunnels 10-6
  • Page 8 – IPX R
  • Page 9 – EMOTE; Com Transcend RMON Agents 13-3; VI; ECHNICAL; Com Bulletin Board Service A-1
  • Page 10 – NDEX
  • Page 11 – Introduction; The; Audience description; The following table shows where to find specific information.
  • Page 12 – Conventions; Table 1
  • Page 13 – LANplex® 2500 Unpacking Instructions; Table 2; screen; commands; Italic
  • Page 14 – card
  • Page 15 – Documentation Comments; Module Installation Guides
  • Page 17 – PLEX; IP multicast routing
  • Page 18 – Using Menus; Administration Console User Guide
  • Page 19 – Bridge Menu; From the; menu, you can view information about and configure; bridge; Bridge Menu Hierarchy
  • Page 20 – IP Menu; IP Menu Hierarchy
  • Page 21 – IPX Menu; menu, you can view information about and configure Internet; ipx; at the; ipx; at the interface menu.; IPX Menu Hierarchy
  • Page 22 – Appletalk Menu; appletalk; at the AppleTalk menu, then; define; Appletalk Menu Hierarchy
  • Page 23 – ON; About VLANs; Types of VLANs
  • Page 24 – MAC Address Group VLANS; LANplex Administration Console User Guide; Application-Oriented VLANS
  • Page 25 – LANplex; Protocol Suite
  • Page 26 – Switch Ports; NetBIOSTM
  • Page 27 – Default VLAN
  • Page 28 – VLAN Exception
  • Page 29 – Overlapped IP; For example, two IP VLANs can be configured for ports 1-10 as follows:; VLAN 1; Index; Default
  • Page 30 – Routing Between; For example, to create an IP interface that can route through a VLAN:; IPX on port 6
  • Page 32 – VLAN Examples; Example of a Protocol-Sensitive VLAN Configuration
  • Page 33 – Example 2; A VLAN Configuration with Servers on Separate 100BASE-T ports.
  • Page 35 – Connect enterprise networks together
  • Page 36 – Traditional Architecture of a Routed Network; LANplex in a; Subnetted Architecture with LANplex® Switching Hubs
  • Page 37 – LANplex®; MAC address; refers to a physical hardware address.; network address; refers to a logical address that applies to a; Multiple Ports per Subnets with the LANplex 2500 System
  • Page 38 – Traditional Bridging and Routing Model; bridged
  • Page 39 – Bridging and Routing Models; Bridging in the Traditional Bridging and Routing Model; In the traditional bridging and routing model, a packet is; Routing in the Traditional Bridging and Routing Model
  • Page 40 – LANplex Bridging; In the LANplex bridging/routing model, a packet is; Bridging in the LANplex Bridging and Routing Model
  • Page 41 – In the LANplex bridging and routing model, a packet is; Routing in the LANplex Bridging and Routing Model
  • Page 43 – ECHNOLOGY; What IP routing involves; OSI Reference Model and IP Routing
  • Page 44 – next hop; IP Addresses; network part; IP Address: Network Part and Host Part
  • Page 45 – Elements of IP Routing; Address Classes; subnet part
  • Page 46 – How a Subnet Mask Is Applied to the IP Address; with a subnet mask of; Router Interfaces
  • Page 47 – Router Interfaces in the LANplex System; Routing Table; Router
  • Page 48 – Example of a Routing Table in the LANplex Routing Model; Statically; — You manually enter routes, which do not change until; Dynamically; — The router uses a routing protocol, such as RIP, to; Static Routes; RIP operates in terms of active and passive devices. The
  • Page 49 – Default Route; . The router uses the default; Address Resolution; Once the host or router knows the IP address of the; Example of an ARP Cache; packet to all the devices on the; ARP Cache
  • Page 50 – Example of an ARP Request Packet; ARP reply; Example of ARP Cache Updated with ARP Reply; ARP Request
  • Page 51 – IP Routing Transmission Errors; ICMP Echo Request
  • Page 52 – See the; About Logical IP; caches
  • Page 53 – IP Routing References; Forwarding to Nodes within an LIS
  • Page 55 – Internet Group Management Protocol (IGMP); IGMP
  • Page 56 – DVMRP; The MBONE
  • Page 57 – Multicast Routing Algorithms; Flooding
  • Page 58 – Figure 5-1 shows a simple network with five links.; Simple Network Implemented Without Using Spanning Tree; Reverse Path; If the condition in Step 2 is false, the system drops the packet.
  • Page 59 – Multicast Interfaces; Pruning; DVMRP Metric Value
  • Page 60 – Rate Limit; Multicast Tunnels
  • Page 61 – Environment; networking system developed by Xerox Corporation.; OUTING
  • Page 62 – NetWare Protocols and the OSI Reference Model; Internet Packet
  • Page 63 – IPX Routing in the NetWare® Environment; Routing
  • Page 64 – IPX Packet Format
  • Page 65 – How IPX Routing Works
  • Page 66 – IPX Packet Delivery; IPX Packet Routing; Sending Node’s Responsibility
  • Page 67 – Router’s Responsibility
  • Page 68 – can; Interface
  • Page 69 – The Elements of IPX Routing; Routing Table Example; Generating Routing Table Information
  • Page 70 – Selecting the Best Route; Select the route that requires the lowest number of ticks.; Service Advertising
  • Page 71 – initiate a session with a file server.; A response to a workstation or a router request; SAP Packet Structure
  • Page 73 – Server Information Table
  • Page 74 – A static server is one you manually configure in the server; Dynamic Routes Using SAP.; An automated method of adding and; Server Information Maintenance; Router SAP agents implement an aging mechanism to handle
  • Page 75 – SAP Request Handling.; When a SAP agent receives a general request, it
  • Page 77 – About AppleTalk®
  • Page 79 – AppleTalk® Network Elements; AppleTalk® Zones; AppleTalk Networks and AppleTalk Zones
  • Page 80 – Seed Routers; Physical Connectivity
  • Page 81 – AppleTalk Protocols; AppleTalk Protocols and the OSI Reference Model; Physical
  • Page 82 – An AppleTalk internet has four transport layer protocols:
  • Page 83 – The network range
  • Page 84 – AppleTalk nodes use the AEP to send; Network Range
  • Page 85 – This protocol, along with the; The Session Layer Protocols; An AppleTalk internet has four session-layer protocols:
  • Page 86 – Presentation Layer; About AARP
  • Page 89 – bridge vlan summary; bridge vlan detail
  • Page 90 – Example of a detailed display for the VLANs:; Field
  • Page 91 – Defining VLAN Information; bridge vlan define; all; OR; undefined; inPackets
  • Page 92 – Enter Protocol Suite; IP; Enter VLAN Identifier:; “SD Marketing”; Enter IP Subnet Address:; The maximum number of VLANs you can define on a single bridge is 32.; bridge vlan modify; defined
  • Page 93 – Removing VLAN Information; modify; Follow these steps to remove a VLAN definition:; bridge vlan remove; Enter the indexes for the VLANs you want to remove.; remove
  • Page 95 – IP R
  • Page 96 – LIS Interfaces; LANplex® 2500 Operation Guide; LIS
  • Page 97 – Administering interfaces; LIS Interface; Displaying; ip interface summary
  • Page 98 – Example summary display:; Defining an IP LIS; To define an IP interface:; ip interface define
  • Page 99 – Enter the IP address of the interface.
  • Page 100 – Defining an IP; Index Ports
  • Page 101 – Modifying an; and; Removing an; PVC associated with the interface index 2. Do you wish
  • Page 102 – ip interface addAdvertisement
  • Page 103 – Administering Routes; Adding a Permanent; This command adds a PVC to an LIS interface.; ip interface addPvc; . Separate additional entries with a comma.; Removing a; ip interface removePVC; Each routing table entry contains the following information:; Destination IP Address and Subnet Mask; — These elements define the
  • Page 104 – Routing Metric; — This metric specifies the number of networks or subnets; Gateway IP Address; — This address tells the router how to forward; — For each interface, the route provides the status information in; Status
  • Page 105 – Displaying the; ip route display; Defining a Static; To define a static route:; ip route static; Enter the destination IP address of the route.
  • Page 106 – Enter destination IP address:; Removing a Route; From the top level of the Administration Console, enter:; ip route remove; Flushing a Route; Flushing deletes all learned routes from the routing table.; ip route flush; Setting the Default
  • Page 107 – Administering the ARP Cache; To statically configure the default route:; ip route default; Enter the gateway IP address of the route.; Removing the; ip route noDefault; The default route is immediately removed from the routing table.
  • Page 108 – Displaying the ARP; You can display the contents of the ARP cache for your system.; ip arp display; Example display of the contents of the ARP cache:; Removing an ARP; ip arp remove; Enter the IP address you want to remove.
  • Page 109 – Administering ATM ARP Servers; Flushing the ARP; ip arp flush; The ARP cache entries are immediately removed from the table.; atmArpServer; menu also includes the; arp; option, which allows you to; Displaying ATM; ip atmArpServer display
  • Page 110 – Defining an ATM; ip atmArpServer define; Enter the IP address of the ATM port you want to define.; Removing an ATM; ip atmArpServer remove
  • Page 111 – Displaying the ATM; ip atmArpServer arp display; ip atmarpserver arp remove; Enter the ATM address you want to remove.
  • Page 112 – Flushing the ATM; ip atmarpserver arp flush; The ATM ARP cache entries are immediately removed from the table.
  • Page 113 – Administering UDP Helper; ip udpHelper display; ip udpHelper define
  • Page 114 – ip udpHelper hopCountLimit; Setting the BOOTP; ip udpHelper threshold; disabled; ip routing; enable
  • Page 115 – Enabling and Disabling ICMP Router Discovery; ip icmpRouterDiscovery; Off; not
  • Page 116 – RIP default mode; passive; ip rip; off; ip ping; Network is unreachable
  • Page 117 – Displaying IP Statistics; ip statistics
  • Page 119 – Administering IP multicast interfaces
  • Page 120 – ip multicast dvmrp; Query mode; — The router or switch with the lowest IP address in the LAN; Snooping mode; — A router or switch performs dynamic multicast
  • Page 121 – Administering IP Multicast Interfaces; enabled; ip multicast igmp; Enter igmp snooping mode; , which means that the interface will forward
  • Page 122 – To display a multicast interface:; ip multicast interface display; Enter the index numbers of the interfaces you want to display.; Index Local Address Metric Threshold RateLimit State
  • Page 123 – Disabling Multicast; To disable multicast routing on an interface:; ip multicast interface disable; Enter the index number of the interface you want to disable.; Enabling Multicast; From the top level of the Administration console, enter:; ip multicast interface enable
  • Page 124 – ip multicast tunnel display; Example IP multicast tunnel configuration:; pkts in:320069 pkts out:0
  • Page 125 – Administering Multicast Tunnels; Defining a; ip multicast tunnel define; Enter remote IP address:; ip multicast tunnel remove
  • Page 126 – Displaying Routes; To display all available routes in the IP multicast routing table:; ip multicast routeDisplay; The DVMRP status and IGMP status appear on the screen.
  • Page 127 – Displaying the Multicast Cache; ip multicast cacheDisplay
  • Page 128 – DVMRP is enabled, IGMP snooping is enabled; The following display shows the multicast cache configuration:
  • Page 129 – Table 10-2 describes the fields in the cache display.
  • Page 132 – IPX network address; Up; VLAN index
  • Page 133 – Administering Interfaces; Displaying IPX; ipx interface display; Defining an IPX; ipx interface define; Index IPX address Cost Format State VLAN index
  • Page 134 – To modify an IPX interface:; ipx interface modify; To remove an IPX interface definition:; ipx interface remove; The interface is removed.; Ports
  • Page 135 – Address
  • Page 136 – ipx route display; ipx route static; Enter the 4-byte IPX network address of the route.
  • Page 137 – Enter the node address of the route.; ipx route remove; The route is immediately deleted from the routing table.; Flushing Routes; ipx route flush
  • Page 139 – Administering Servers; ipx server display; ipx server static
  • Page 140 – Enter the number of hops to the server.; Removing a Server; ipx server remove; Enter the service type of the server.; Flushing Servers; To flush all learned servers:; ipx server flush
  • Page 141 – ipx forwarding
  • Page 142 – ipx rip; Enhanced RIP default; By default, enhanced RIP is; ipx enhanced; Enter the enhanced RIP state (; or
  • Page 143 – Setting the SAP Mode; — The system ignores all incoming SAP packets and does not generate; Passive; — The system processes all incoming SAP packets, but it does; Active; — The system processes all incoming SAP packets, responds to; SAP default mode; ipx sap
  • Page 144 – IPX summary statistics; ipx statistics summary; Table 11-1 describes the IPX summary statistics.; IPX forwarding is enabled, RIP is active, SAP is active
  • Page 145 – Displaying Statistics; Displaying IPX RIP; ipx statistics rip; Table 11-2 describers the IPX RIP statistics.
  • Page 146 – Displaying IPX SAP; ipx statistics sap; Table 11-1 describes the IPX SAP statistics.
  • Page 147 – ipx statistics forwarding; Table 11-4 describes the IPX forwarding statistics.
  • Page 150 – You can configure a maximum of 32 interfaces per router.
  • Page 151 – appletalk interface display; Defining an; To define an AppleTalk interface:; appletalk interface define; The following message appears:
  • Page 152 – Enter the zone name.; To remove an AppleTalk interface:; appletalk interface remove; The interface is no longer defined on the router.
  • Page 153 – A range of numbers used to designate a network segment’s identity; Distance; The distance in hops to the destination network; The defined interface number; State; To display the contents of the routing table:; appletalk route display
  • Page 154 – The following example shows a routing table display:; Flushing all Routes; To flush all learned routes:; appletalk route flush
  • Page 155 – Administering the AARP Cache; AARP randomly assigns an address.
  • Page 156 – To display the contents of the AARP cache:; appletalk aarp display; The following example shows an AARP cache display:
  • Page 157 – Removing an Entry; To remove an AARP cache entry:; appletalk aarp remove; Enter the AARP address at the prompt.; Flushing All Cache; To flush all AARP cache entries:; appletalk aarp flush
  • Page 158 – To display the zone table:; appletalk zone display network; appletalk zone display zone
  • Page 159 – Configuring Forwarding; appletalk forwarding; Enter
  • Page 160 – appletalk checksum; echo; appletalk ping
  • Page 161 – Viewing Appletalk Statistics; Routing Table Maintenance Protocol (RTMP); Displaying DDP; To display DDP statistics:; appletalk statistics ddp; The following is an example of DDP summary statistics:
  • Page 162 – Displaying RTMP; To display RTMP statistics:; appletalk statistics rtmp; An example of summary statistics is shown below:
  • Page 163 – Displaying ZIP; To display ZIP statistics:; appletalk statistics zip
  • Page 165 – Displaying NBP; To display NBP statistics:; appletalk statistics nbp; outGniReplies
  • Page 166 – Table 12-4 describes the NBP statistics you can view.
  • Page 168 – The Probe
  • Page 169 – Benefits of RMON
  • Page 170 – LANplex RMON Implementation; Com Transcend; You can integrate RMON with normal device management; RMON Groups Supported in the LANplex® System; Group; Statistics
  • Page 171 – Embedded RMON Implemented on the LANplex System; agent; MIB Objects
  • Page 172 – Example of an RMON MIB Counter Object
  • Page 173 – Alarms; roll
  • Page 174 – Setting Alarm; Figure 13-3 shows a counter with thresholds set manually.; Manually Set Thresholds
  • Page 175 – RMON Hysteresis
  • Page 176 – Appendix A; Technical Support; PPENDIX
  • Page 177 – World Wide Web site; automated fax service; Com Bulletin; Country
  • Page 178 – Access by Digital Modem; Log on to CompuServe.; go threecom
  • Page 179 – Support from Your Network Supplier; ComFacts; Diagnostic error messages
  • Page 180 – for customer service.; Returning Products
  • Page 181 – Numerics; See
  • Page 182 – See also
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®

LAN

PLEX

®

2500 E

XTENDED

S

WITCHING

U

SER

G

UIDE

Part No. 801-00343-000
Published November 1996
Revision 02

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Summary

Page 3 - ONTENTS; LAN; II; VLAN; Types of VLANs 2-1

C ONTENTS A BOUT T HIS G UIDE Introduction 1How to Use This Guide 1Conventions 2LANplex 2500 Documentation 3Documentation Comments 5 P ART I G ETTING S TARTED 1 LAN PLEX ® E XTENDED S WITCHING F EATURES About LANplex Extended Switching 1-1Using Menus 1-2 Bridge Menu 1-3IP Menu 1-4IPX Menu 1-5Appleta...

Page 4 - Modifying the Default VLAN 2-5; ART; III; BOUT; Bridging and Routing Models 3-4; IP T; Forwarding to Nodes within an LIS 4-11

Modifying the Default VLAN 2-5 How the LANplex® System Makes Flooding Decisions 2-5VLAN Exception Flooding 2-6Overlapped IP VLANs 2-7Routing Between VLANs 2-8VLAN Examples 2-10 Example 1 2-10Example 2 2-11 P ART III A BOUT R OUTING P ROTOCOLS 3 B RIDGING AND R OUTING IN THE LAN PLEX ® S YSTEM What I...

Page 5 - IP M; ULTICAST; IPX

5 R OUTING WITH IP M ULTICAST About IP Multicast Routing 5-1IGMP 5-1DVMRP 5-2 The MBONE 5-2 Multicast Routing Algorithms 5-3 Flooding 5-3Spanning Trees 5-3Reverse Path Forwarding 5-4Pruning 5-5 Multicast Interfaces 5-5 DVMRP Metric Value 5-5Time-To-Live ( TTL) Threshold 5-5Rate Limit 5-6 Multicast T...

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