Numerics

 0x51 output, interpreting 4-3

 10Base2. See BNC

 10Base5. See AUI

10BaseT

 checking 1-10

 DIP switch position 1-8

 32-bit netmask table 3-11

A

 abort errors 1-3

 Address Resolution Protocol. See ARP

 administrative Telnet session 3-4

 Annex-D, monitoring keepalive packets 6-4

ARP requests

 checking AUI 1-11

 diagnosing Ethernet problems 3-9

AUI

 checking 1-11

 DIP switch position 1-8

 authentication problems 2-21

B

 backing up configuration 2-2, 2-16

 Basic Rate Interface. See BRI

BNC

 checking 1-11

 DIP switch position for 1-8

 booting from PROM 2-13

 BOOTP, port number 3-7

BRI

 CES state 5-4

 connections 5-3

 D channel status 5-3

 diagnosing problems 5-2

 directory number 5-4

 number plan 5-4

 number type 5-4

 port status 5-3

 SPID 5-4

 BRI port, displaying information 5-3

C

cables

 Frame Relay connections 6-2

 serial 1-5

 cause codes, ISDN connections 5-5, A-1

 CCP 4-10

 CES state, BRI connections 5-4

 checksum 2-6

 checksum error, netboot 2-8

 ChoiceNet, port number 3-7

 CIDR netmasks 3-11

 Cisco routers, compatibility with PortMaster 6-3

 classless interdomain routing netmasks 3-11

 collisions, Ethernet 1-12

ComOS

 corrupted 2-3

 determining the version 3-8

 downloading via FTP 2-9

 erasing 2-2, 2-5

 reloading 2-5, 2-16

 upgrading 2-4

 Compression Control Protocol 4-10

configuration

 backing up 2-2, 2-16

 corrupted 2-3, 2-8

 default settings 2-4

 erasing 2-2

 temporarily changing with ifconfig 3-12

 connection problems, Internet 3-21

 connectivity, verifying 3-9

console

 blank screen 2-19

 connecting to port 3-3

 output unreadable 2-20

 setting and resetting 3-5

contact information

 Europe, Middle East, and Africa xiv

 mailing lists xv

 North America, Latin America, and Asia Pacific xiv

 technical support xiv

 conventions in this guide xii

corrupted

 configuration 2-2

 frames 1-4

CSU/DSU

 frame errors 1-5

 Frame Relay 6-3, 6-10

D

 data link connection identifier list. See DLCI list

 daughterboard, Ethernet 1-14

 DB-25-to-RJ-45 connectors 1-5

D channel

 establishment on PRI connections 5-8

 status for PRI connections 5-5

 status on BRI connections 5-3

debugging

 PPP negotiation 4-2

 Stac LZS messages 4-10

 Decoder Ring 4-3

 default configuration settings 2-4

 deleting routes 3-20

 device errors 1-3

dial-in

 connections, Multichassis PPP 4-7

 users, abort errors 1-3

DIP switch

 Ethernet problems 1-8

 positions 1-8

 directory number, BRI connections 5-4

DLCI list

 determining 6-5

 diagnosing Frame Relay problems 6-5

 IP addresses 6-15

DNS

 filtering packets with ptrace 3-15

 port number 3-7

 problems with the server 3-15

 documentation, related ix

 document conventions xii

 Domain Name System. See DNS

 dotted decimal, converting to hexadecimal 3-11

 DRAM 2-3

 dring 4-3

 DSU. See CSU/DSU

 dynamic RAM 2-3

E

 encoding, changing on PRI connections 5-6

 endpoint discriminator, Multichassis PPP 4-6

 entering commands, inability to 2-19

 EPROM, diagnosing problem with 1-7

 erasing ComOS 2-5, 2-6

 erasing NVRAM 2-2, 2-4, 2-5, 2-6

errors

 abort 1-3

 device 1-3

 environmental causes 1-5

 frame 1-4

 port 1-2

Ethernet

 collision rates and errors 1-12

 daughterboard 1-14

 diagnosing network problems 1-12

 DIP switch 1-8

 Multichassis PPP 4-5

 Ethernet port, problems 1-7

F

 factory default configuration, resetting 2-4

 filters, tracing packets 3-12

 Flash RAM. See NVRAM

 forgotten password 2-20

 frame errors 1-4

 environmental causes 1-5

 modems and CSU/DSUs 1-5

 serial cables 1-5

 wiring 1-5

Frame Relay

 cables 6-2

 CSU/DSU 6-3

 DLCI list 6-5, 6-15

 inactive connection 6-8

 interfaces 6-8

 IPX 6-11

 LMI and Annex-D keepalive packets 6-4

 on IRX 6-3

 ping 6-10

 PortMaster 2R 6-3

 preliminary troubleshooting 6-2

 SAP table 6-12

 subinterfaces 6-12

 traceroute 6-10

 frames, corrupted 1-4

 framing, changing for PRI connections 5-6

FTP

 downloading new ComOS 2-9

 downloading pminstall 2-16

H

hardware

 frame errors 1-4

 problems 1-9

 hexadecimal, converting to dotted decimal 3-11

 hunt group, Multichassis PPP 4-8

I

 ICMP, traceroute 3-21

 IDLE port state 1-6

 idle timer 3-14

ifconfig

 temporarily changing configuration 3-12

 verifying configurations 3-10

 Integrated Services Digital Network. See ISDN

 Internet, inability to connect 3-21

 IP packets, tracing 3-14

IPX

 Ethernet 1-8

 filtering packets with ptrace 3-16

 Frame Relay 6-11

 IRX, Frame Relay connections 6-3

ISDN

 BRI connections 5-2

 BRI port information 5-3

 cause codes 5-5, A-1

 CES state, BRI connections 5-4

 D channel establishment, PRI connection 5-8

 D channel status, BRI connections 5-3

 D channel status, PRI connections 5-5

 directory number, BRI connections 5-4

 encoding, PRI connections 5-6

 framing, PRI connections 5-6

 line status 5-7

 number plan, BRI connections 5-4

 number type, BRI connections 5-4

 receive level 5-7

 receive patterns, PRI connections 5-8

 resetting PRI at switch 5-8

 send patterns, PRI connections 5-8

 SPID, BRI connections 5-4

K

 keepalive packets, monitoring 6-4

L

 LCP, packet formats B-3

LED

 PRI connections 5-7

 solid green 2-18

 line status, on PRI connections 5-7

 line testing 1-6

 listening socket 3-6

 LMI, monitoring keepalive packets 6-4

 Local Management Interface 6-3

 loopback, using to reset PRI at switch 5-8

M

 MAC address, diagnosing Ethernet port problems 1-7

 mailing lists, subscribing to xv

 media access control address 1-7

 modems, frame errors 1-5

 monitoring keepalive packets 6-4

Multichassis PPP

 diagnosing problems with 4-5

 dial-in problems 4-7

 displaying port use 4-7

 endpoint discriminator 4-6

 Ethernet segment 4-5

 physical connections 4-7

 port number 3-7

 routers 4-5

 virtual connections 4-7

N

 neighbors, Multichassis PPP 4-8

netbooting

 from PROM 2-13

 network connection 2-11

 preparation 2-7

 rarpd 2-11

 reasons to netboot 2-7

 TFTP 2-8

 troubleshooting 2-18

 without a network connection 2-13

 without rarpd 2-12

 netmask table 3-11

 network, protocol values B-1

 network handle 3-7

 network interface card, faulty 1-7

 network problems, diagnosing 1-12

 network statistics, diagnosing network problems 1-9

 NIC, faulty 1-7

 noise causing frame errors 1-6

 nonvolatile RAM. See NVRAM

 null modem cable, connecting to console port 3-3

 number plan, BRI connections 5-4

 number type, BRI connections 5-4

NVRAM

 description 2-2

 erasing 2-2, 2-4, 2-5, 2-6

 netbooting 2-8

 reformatting 2-3

O

 overloaded Ethernet 1-12

P

packet

 formats, PPP B-1

 information, displayed by ptrace 3-12

 size, and errors 1-4

 tracing 3-12

 panic watchdog timer 2-20

 passive hub, Ethernet 1-13

 password, forgotten 2-20

 physical connections, Multichassis PPP 4-7

 physical interface, PRI connections 5-5

ping

 command 3-9

 Ethernet network problems 1-9

 Frame Relay 6-3, 6-10

 tracing ping packets 3-18

 troubleshooting with 3-9

pmcommand

 number of concurrent sessions 3-8

 port number 3-7

pmconsole

 number of concurrent sessions 3-8

 port number 3-7

 pmd, port number 3-7

pminstall

 installing new ComOS 2-16

 number of concurrent sessions 3-8

 port number 3-7

 pmreadconf 3-8

 port errors 1-2

 PortMaster 2R, Frame Relay connections 6-3

 port numbers and services 3-7

ports

 BRI display information 5-3

 disabling 1-6

 displaying use in Multichassis PPP 4-7

 Ethernet port 1-7

 status 1-2

 port speeds 6-3

port states

 IDLE 1-6

 USERNAME 1-6

PPP

 debugging negotiation 4-2

 decoder ring (DRING) 4-3

 packet formats B-1

 See also Multichassis PPP

PRI

 D channel establishment 5-8

 D channel status 5-5

 encoding 5-6

 framing 5-6

 line status 5-7

 receive level 5-7

 receive patterns 5-8

 resetting connection at switch 5-8

 send patterns 5-8

 Primary Rate Interface. See PRI

PROM

 booting from 2-13

 commands 2-13

 version 2-13

ptrace

 disabling 3-13

 routing problems 3-19

R

 RADIUS, port number 3-7

 RADIUS accounting, port number 3-7

 rarpd, netbooting 2-11

 receive level, for PRI connection 5-7

 receive patterns, on PRI connection 5-8

 references x

 books xii

 related documentation ix

 reloading ComOS 2-5

 resets, network problems 1-9

 resetting the console 3-5

 resetting to factory default configuration 2-4

 RFCs x

RIP

 port number 3-7

 tracing packets 3-19

 routers, and Multichassis PPP 4-5

routes

 deleting 3-20

 static 3-20

 tracing 3-21

routing

 diagnosing problems with traceroute 3-21

 finding a particular route 3-22

 Frame Relay 6-3

 using ptrace to troubleshoot 3-19

S

 SAP, Frame Relay 6-12

 send patterns, PRI connections 5-8

 serial cables 1-5

 serial port, booting 2-13

 Service Advertising Protocol 6-12

 service profile identifier 5-4

 services, and port numbers 3-7

 setting the console 3-5

 shared memory error 2-20

 show commands, affected by ComOS erasure 2-3

 SNMP, port number 3-7

 software version, determining 3-8

 speed, port 6-3

 SPID, on BRI connections 5-4

 static routes 3-20

 subinterfaces 6-12

 subnet mask, ping problems 3-9

 support, technical xiv

 switching hub, Ethernet 1-13

 synchronous hardwired port, disabling 1-6

 syslog, port number 3-7

T

 TCP, tracing packets 3-16

 technical support xiv

Telnet

 administrative session 3-4

 filtering out your own traffic with ptrace 3-13

 problems 3-5

 resetting session 3-7

 telnet, port number 3-7

 terminal emulation mode 3-3

 termination causes C--1

TFTP

 netbooting without rarpd 2-12

 netbooting with rarpd 2-11

 setting up on a boot host 2-10

 tftpd daemon, booting from 2-13

 thicknet. See AUI

 thinnet. See BNC

 traceroute, Frame Relay 6-3, 6-10

tracing

 packets 3-12

 routes 3-21

 traffic, reducing 1-13

 Trivial File Transfer Protocol. See TFTP

U

UDP

 traceroute 3-21

 tracing packets 3-17

 uptime, displaying 3-8

 User Datagram Protocol. See UDP

 USERNAME port state 1-6

V

 verifying connectivity 3-9

 version, determining 3-8

 virtual connections, Multichassis PPP 4-7

W

 WAN port speeds 6-3

 wiring, frame errors 1-5