Netband Project - Goodies
From Teknologisk videncenter
IOS and Linux Goodies
This page is part of the Netband Project
IOS Goodies
- send messages to other adminsitrative users through the cli
B1rt1#send * Enter message, end with CTRL/Z; abort with CTRL/C: hej hej ^Z Send message? [confirm] B1rt1# *** *** *** Message from tty194 to all terminals: *** hej hej
B1rt1# *** *** *** Message from tty194 to all terminals: *** hej hej
- disable password check on telnet sessions
line vty 0 4 no login line vty 5 15 no login
- log straight into privilege mode
aaa new-model username admin privilige 15 password cisco ! aaa authentication login default group local aaa authorization console aaa authorization exec default local
- tells the router to hold messages until it detects no input from the keyboard and no other output from the router.
line con 0 logging synchronous line aux 0 line vty 0 4 logging synchronous line vty 5 logging synchronous
- Show the configuration from a user specified point
Switch#sh run | begin router ospf router ospf 1 router-id 192.168.1.2 log-adjacency-changes passive-interface FastEthernet0/5 network 192.168.1.2 0.0.0.0 area 0 network 192.168.1.6 0.0.0.0 area 0
- Or type / at --more-- and the string you are searching for
Switch#sh run Building configuration... <output omitted> /router ospf filtering... router ospf 1 router-id 192.168.1.2 log-adjacency-changes passive-interface FastEthernet0/5 network 192.168.1.2 0.0.0.0 area 0 network 192.168.1.6 0.0.0.0 area 0
- Macros can be used to execute multiple commands at once (only on switches)
Switch(config)# interface range fa0/1 - 24 Switch(config-if-range)# switchport host switchport mode will be set to access spanning-tree portfast will be enabled channel group will be disabled
- User definded macro
Switch(config)#macro name test Enter macro commands one per line. End with the character '@'. switchport access vlan $VLANID @
Switch(config-if)#do sh run interface fa0/15 Building configuration... Current configuration : 132 bytes ! interface FastEthernet0/15 switchport access vlan 3 switchport mode access spanning-tree portfast end Switch(config-if)#macro apply test 5 Switch(config-if)#do sh run interface fa0/15 Building configuration... Current configuration : 139 bytes ! interface FastEthernet0/15 switchport access vlan 5 switchport mode access macro description test spanning-tree portfast end
- View the contents of a file in filesystem
fiber01#dir
Directory of flash:/
1 -rw- 22245164 Nov 10 2008 21:42:56 +00:00 c180x-adventerprisek9-mz.124-15.XY4.bin
2 -rw- 780 Nov 11 2008 15:40:14 +00:00 vlan.dat
3 -rw- 12421 Jun 17 2009 10:25:24 +02:00 config.txt
31932416 bytes total (9359360 bytes free)
fiber01#more flash:config.txt
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime localtime
service password-encryption
!
hostname fiber01
!
boot-start-marker
boot-end-marker
<output omitted>
Linux Godies
- When you look at logs and need realtime monitoring use the -f argument on tail. If you've changed something in the MRTG config file and want to know if it is correct use "tail -f /var/log/mrtg/mrtg.log" to monitor the log.
root@UbuntuBox:~# tail -f /var/log/mrtg/mrtg.log
2009-04-20 08:30:05: ERROR: Target[Router][_IN_] 'Di $target->[14]{$mode} ' (kill): Can't call method "Di" on unblessed reference at (eval 42) line 1.
2009-04-20 08:30:05: ERROR: Target[Router][_OUT_] 'Di $target->[14]{$mode} ' (kill): Can't call method "Di" on unblessed reference at (eval 43) line 1.
2009-04-20 08:35:03: ERROR: Target[Router][_IN_] 'Di $target->[14]{$mode} ' (kill): Can't call method "Di" on unblessed reference at (eval 42) line 1.
2009-04-20 08:35:03: ERROR: Target[Router][_OUT_] 'Di $target->[14]{$mode} ' (kill): Can't call method "Di" on unblessed reference at (eval 43) line 1.
- Linux network emulater
- Can be used to emulate slow wan links with packet drops, delay and jitter
http://www.linuxfoundation.org/en/Net:Netem
- Network Connection Bridge
- This can be used to bridge two ethernet connections under ubuntu