Page 186 / 196
Scroll up to view Page 181 - 185
C-10
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
Appendix C
ROM Monitor
Exiting the ROM Monitor
Exiting the ROM Monitor
You must set the configuration register to a value from 0x2 to 0xF for the router to boot a Cisco IOS
image from flash memory upon startup or reloading.
The following example shows how to reset the configuration register and cause the router to boot a
Cisco IOS image stored in flash memory:
rommon 1 >
confreg 0x2101
You must reset or power cycle for new config to take effect:
rommon 2 >
boot
The router will boot the Cisco IOS image in flash memory. The configuration register will change to
0x2101 the next time the router is reset or power cycled.
Page 187 / 196
D-1
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
A P P E N D I X
D
Common Port Assignments
Table D-1
lists currently assigned Transmission Control Protocol (TCP) port numbers. To the extent
possible, the User Datagram Protocol (UDP) uses the same numbers.
Table D-1
Currently Assigned TCP and UDP Port Numbers
Port
Keyword
Description
0
—
Reserved
1–4
—
Unassigned
5
RJE
Remote job entry
7
ECHO
Echo
9
DISCARD
Discard
11
USERS
Active users
13
DAYTIME
Daytime
15
NETSTAT
Who is up or NETSTAT
17
QUOTE
Quote of the day
19
CHARGEN
Character generator
20
FTP-DATA
File Transfer Protocol (data)
21
FTP
File Transfer Protocol
23
TELNET
Terminal connection
25
SMTP
Simple Mail Transport Protocol
37
TIME
Time
39
RLP
Resource Location Protocol
42
NAMESERVER
Hostname server
43
NICNAME
Who is
49
LOGIN
Login Host Protocol
53
DOMAIN
Domain name server
67
BOOTPS
Bootstrap Protocol Server
68
BOOTPC
Bootstrap Protocol Client
69
TFTP
Trivial File Transfer Protocol
75
—
Any private dial-out service
Page 188 / 196
D-2
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
Appendix D
Common Port Assignments
77
—
Any private RJE service
79
FINGER
Finger
95
SUPDUP
SUPDUP Protocol
101
HOST NAME
Network interface card (NIC)
hostname server
102
ISO-TSAP
ISO-Transport Service Access Point
(
TSAP)
103
X400
X400
104
X400-SND
X400-SND
111
SUNRPC
Sun Microsystems Remote
Procedure Call
113
AUTH
Authentication service
117
UUCP-PATH
UNIX-to-UNIX Copy Protocol
(UUCP) Path Service
119
NNTP
Usenet Network News Transfer
Protocol
123
NTP
Network Time Protocol
126
SNMP
Simple Network Management
Protocol
137
NETBIOS-NS
NetBIOS name service
138
NETBIOS-DGM
NetBIOS datagram service
139
NETBIOS-SSN
NetBIOS session service
161
SNMP
Simple Network Management
Protocol
162
SNMP-TRAP
Simple Network Management
Protocol traps
512
rexec
UNIX remote execution (control)
513
TCP—rlogin
UDP—rwho
TCP—UNIX remote login
UDP—UNIX broadcast name
service
514
TCP—rsh
UDP—syslog
TCP—UNIX remote shell
UDP—system log
515
Printer
UNIX line printer remote spooling
520
RIP
Routing Information Protocol
525
Timed
Time server
Table D-1
Currently Assigned TCP and UDP Port Numbers (continued)
Port
Keyword
Description
Page 189 / 196
IN-1
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
I N D E X
Symbols
-? command
3
? command
4, 3
A
AAL
6
AAL3/4
6
AAL5
6
abbreviating commands
6
access groups
3
access lists
applying to interfaces
4
configuration commands
2
configuring for firewalls
3, 2
description
11
ACK bits
11
Address Resolution Protocol
See
ARP
ADSL
configuring
6
ordering
4
overview
1
troubleshooting
2
aggregator, configuring
20
ARP
2
Asymmetric Digital Line Subscriber Line
See
ADSL
ATM
errors, displaying
6
events, displaying
7
interface, configuring basic parameters
7
interface, configuring for PPPoA
5
overview
5
packets, displaying
8
PVC encapsulation types
6
queues
10
troubleshooting commands
2 to 9
ATM adaptation layer
See
AAL
ATM interface
See
ATM
audience, user
11
authentication protocols
See
PPP authentication protocols
AutoSecure
2
auxiliary port, for dial backup
9
B
backup interfaces, for dial backup
1
b command
3
b flash command
3
boot commands
3
bridging, configuring
9, 4
broadcast intervals, RIP
3
C
CAR
9
caution, described
13
CBAC firewall, configuring
3
CBWFQ
9
CHAP
4
Cisco IOS Firewall IDS
4
Page 190 / 196
Index
IN-2
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
Cisco IOS queues
10
class-based weighted fair queuing
See
CBWFQ
command conventions
13
command-line access to router
configuration example
11
configuring
9
command modes
2 to 4
commands
-?
3
?
4
abbreviating
6
access list
2
ATM troubleshooting
2 to 9
b
3
b flash
3
boot
3
completing
4
confreg
6
context
9
copy running-config startup-config
7
copy tftp flash
3
debug atm
6
debug atm errors
6
debug atm events
7
debug atm packet
8
dir device
3
finding available
4
flowcontrol
2
frame
9
help
3
help with
4
i
3
k
9
meminfo
9
permit
11
ping atm interface
3
privileged EXEC, accessing
5
redisplaying
4
reset
3
ROM monitor
2 to 3
ROM monitor debugging
8, 9
show atm interface
5, 6
show controllers dsl
8
show dsl interface atm
7
show interface
3
stack
9
sysret
9
tftpdnld
3, 5
undoing
6
xmodem
8
command variables
listing
4
TFTP download
4
committed access rate
See
CAR
configuration changes
making
5
saving
12, 7
configuration examples
command-line access
11
DHCP server
4
dynamic routes
14
EIGRP
15
PPPoA with NAT
11
PPPoE with NAT
8
simple firewall
5
static route
12
VPN with IPSec and GRE
9
VPN with IPSec tunnel
11
wireless LAN
7
configuration prerequisites
4
configuration register
changing
10 to 11
changing from ROM monitor
6
value, resetting
12
configuring
ATM WAN interface
7
19216811.live