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Router Configure Commands
continued
page 2 of
2
Interface Ethernet 2/0/1 - type slot / port adapter / port number
(interface) for VIP cards
Config terminal - configures RAM
Config network (config net) - changes a config on a tftp host
Config memory - configure NVRAM
Ip address 172.17.1.63 255.255.255.0 secondary - adds a secondary subnet
address to an interface
Clock rate 56000 - sets clock rate to 56kbps for DCE interfaces
Access Lists (ACL)
Access-enable - creates a temporary access-list entry
Access-template - creates a temporary access-list entry
Access-profile - apply user profile to interface
Access-list 1 permit 0.0.0.0 255.255.255.255 - same as next line
Access-list 1 permit any - permits any host
Access-list 1 permit 172.30.16.29 0.0.0.0 - same as next line
Access-list 1 permit host 172.30.16.29 - permits host 172.30.16.29
No access list 1 - deletes access list 1
Ip access-group 1 out (out is default)
Access-list 101 deny tcp 172.16.4.0 0.0.0.255 any eq telnet
Access-list 101 permit ip any any established (TCP connection)
Router(Config)#ip access-list standard nik
Router(Config std-nacl)#deny any log (log - logs packets)
No ip access-group in - won't delete inbound lists if you leave the in off
the end of the command
Frame Relay
Router(Config)#int s0
Router(Config-if)#encapsulation frame-relay cisco (default)
Router(Config-if)#exit
Router(Config)#int s0.16 point-to-point
Router(Config-if)#no inverse-arp
Router(Config-if)#ip address 172.17.1.63 255.255.255.0
Router(Config-if)#bandwidth 64 - sets bandwidth to 64kbps (Only used by
routing protocols)
Router(Config-if)#frame-relay map ip 172.16.30.17 16 ietf broadcast -
broadcast tells the router to send broadcasts out this intf
IGRP Configuration
Router(Config)#router igrp 50
Router(Config-router)#timers basic 15 45 0 60
Router(Config-router)#variance 1-128 (controls load balancing between best
and worse metrics)
Router(Config-router)#traffic-share balanced/min
Balanced - share inversely proportional to metrics
Min - use routers that have only min costs
Router(Config-router)#network 128.6.0.0
Router(Config-router)#no metric holddown
Router(Config-router)#metric maximum-hop 50
IPX RIP Configuration
Router(Config)#ipx routing - enables IPX routing, RIP and SAP
Router(Config)#ipx maximum-paths 2 - enables equal cost load balancing over
2 paths
Router(Config)#ipx per-host-load-share - ensures all packets to 1
destination are sent over same line
Router(Config)#int e0
Router(Config-if)#ipx network 10 encapsulation sap secondary - assigns ipx
network 10 to a secondary interface on Ethernet 0 with encapsulation
Ethernet_802.2
Router(Config-if)#ipx delay 6 - sets tick metric for IPX RIP (LAN = 1, WAN =
6 default)
Router(Config-if)#exit
Cisco ISDN Configuration
Router(Config)#interface bri 0
Router(Config-if)#ip address 172.17.1.63 255.255.255.0
Router(Config-if)#no shutdown
Router(Config-if)#dialer-group 1
Router(Config-if)#dialer map ip 172.16.60.2 name 8042 8350661
(Next router ip - hostname of next route (auth) - number to dial)
Router(Config-if)#dialer load-threshold 2 either - makes both interfaces
come up immediately
Router(Config-if)#dialer load-threshold 255 either - only brings up 2nd
B-channel if first is 100% loaded
Router(Config-if)#hold-queue 75 in - holds 75 packets in the queue during
connection
Router(Config-if)#dialer idle-timeout 300 - sets idle time out (120 default)
Router(Config-if)#encapsulation ppp
Router(Config-if)#exit
Router(Config)#dialer-list 1 list 110
Router(Config)#access-list 110 permit tcp any any eq smtp
Router(Config)#access-list 110 permit tcp any any eq telnet
Static/Default Routes
Ip route 0.0.0.0 0.0.0.0 172.16.20.1 = default route
Ip default-network 172.16.1.0
Ip route 172.17.1.63 255.255.255.0 serial 1 1 permanent - keeps static route
even if router cannot communicate with it, administration distance 1
Cisco Discovery Protocol (CDP) Commands
Cdp timer 90
Cdp holdtime 240
Cdp enable (no cdp enable)
1900 SwitchConfiguration
#config t
(Config)#enable password level 1 nikolas - usermode password
(Config)#enable password level 15 makris - enable password
(Config)#enable secret nik2 - precedes the enable p/w
(Config)#hostname nik
(Config)#vtp pruning enable - enables pruning on whole switch
(Config)#delete vtp - deletes VTP database
(Config)#vtp server (client/transparent)
(Config)#vtp domain nikolas
(Config)#vtp password cisco
(Config)#ip address 172.17.1.63 255.255.255.0
(Config)#ip default-gateway 172.17.1.50
(Config)#switching-mode store-and-forward (fragment-free)
(Config)#vlan 2 name sales
(Config)#vlan 3 name marketing
(Config)#int Ethernet 0/1 - slot 0/port 1
(Config-if)#vlan-membership static 2
(Config-if)#description Finance_VLAN
(Config-if)#port secure max-mac-count 1 - allows only one mac address per
port
(Config-if)#exit
(Config)#int f0/26
(Config-if)#trunk on - enables trunking of all VLANS not just VLAN 1
(Config-if)#no trunk-vlan 3 - stops trunking vlan 3
(Config-if)#duplex full - sets to full duplex (auto sense default)
(Config-if)#exit
(Config)#copy tftp://192.168.0.120/cat1900EN_9_00.bin opcode - download into
flash memory
(Config)#copy nvram tftp://192.168.0.120/cat1900EN
(Config)#copy tftp://192.168.0.120/cat1900EN nvram
(Config)#delete nvram - deletes config
(Config)#delete vtp - deletes VTP database
(Config)#clear mac-address-table [dynamic]
Cisco Debug Commands
Debug ipx routing activity - info on RIP updates
Debug ipx sap - info on sap updates
Debug ip igrp events - what's being rec'd sent, route type (int/ext,system),
source, dest
Debug ip igrp transactions - shows contents of routing updates
Debug ip rip - source/contents of updates, network, metrics
Debug frame-relay lmi - enables verification of connection
Debug ppp authentication
UNDEBUG ALL
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