Monthly Archives: June 2014
Cisco Routers 2620-XM v 2621-XM
These models are used in the CCIE training. So the difference between them is one 1 FastEthernet port more on 2621XM and of course the price is a litthe higher.
So buy a 2620XM and if you want an extra FE just buy another module but check the prices first.
I found on cisco page the next datasheet: http://www.cisco.com/c/en/us/products/collateral/routers/2600-series-multiservice-platforms/Cisco 2600 series Routers Product Data Sheet
Cisco Wireless Explorer
Play a multilevel game in arranging APs all over the place. Give aliens some probes…
Cisco Wireless Explorer
Play Cisco’s Wireless Explorer: https://learningnetwork.cisco.com/docs/DOC-7560
see Demo Cisco SWAN: wireless_learning_summary.pdf
Beat my score and leave me a comment:
Beat My Score
How to set history size on routers or switches
I wanted to see more than 10 lines in time so I needed a way to have that. History can be set up on console line and/or vty lines. Here is how you will do this on a switch:
SW1>ena SW1#conf t Enter configuration commands, one per line. End with CNTL/Z. SW1(config)#line con 0 SW1(config-line)#his SW1(config-line)#history ? size Set history buffer sizeSW1(config-line)#history si SW1(config-line)#history size ? <0-256> Size of history buffer SW1(config-line)#history size 256 SW1(config-line)#line vty 0 15 SW1(config-line)#hi SW1(config-line)#history size SW1(config-line)#history size 256 SW1(config-line)#exit SW1(config)#exit SW1#wr m 05:13:04: %SYS-5-CONFIG_I: Configured from console by console SW1#wr mem Building configuration... [OK] SW1#
It is the same configuration as for the switch:
R2#conf t Enter configuration commands, one per line. End with CNTL/Z. R2(config)#line con 0 R2(config-line)#his R2(config-line)#history size 256 R2(config-line)#exit R2(config)#line vty 0 15 R2(config-line)#hi R2(config-line)#history si R2(config-line)#history size 256 R2(config-line)#exit R2(config)#exit R2# Jun 12 17:34:34.055: %SYS-5-CONFIG_I: Configured from console by console R2#
It is ok when you read the commands, but if you want to copy and paste them it is difficult. So here are the commands as a script:
ena
conf t
line con 0
history size 256
exit
line vty 0 15
history size 256
exit
exit
wr mem
(you need to copy all, so that write memory to be executed)
Total secure addresses on interface reached its max limit of
I’m trying to simulate a violation and put f0/2 to shutdown state. Everything is set up correctly but I do not know what is happening:
SW4(config-if)#do sh run int f0/2 Building configuration... Current configuration : 254 bytes ! interface FastEthernet0/2 switchport access vlan 20 switchport mode access switchport port-security switchport port-security mac-address sticky switchport port-security mac-address sticky 00e0.4c8b.116f no ip address spanning-tree portfast end
When I connect a different device instead of “err-disabled state” i get:
%Error: Cannot add secure address 5442.49f8.7b80 %Error: Total secure addresses on interface reached its max limit of 1
It seems that the switch (3550) that I’m working on can’t update the MAC address, it says configured MAC addresses: 0.
SW4(config-if)#do sh port int f0/2 Port Security : Enabled Port status : SecureUp Violation mode : Shutdown Maximum MAC Addresses : 1 Total MAC Addresses : 1 Configured MAC Addresses : 0 Sticky MAC Addresses : 1 Aging time : 0 mins Aging type : Absolute SecureStatic address aging : Disabled Security Violation count : 0
I wanted to see past commands that I have typed but I’ve had only 10 of them, because the history size is set to 10 by default. Here is how to set the history size !
And I have no errdisable for recovery mode:
SW4#sh errdisable recov ErrDisable Reason Timer Status ----------------- -------------- udld Disabled bpduguard Disabled channel-misconfig Disabled pagp-flap Disabled dtp-flap Disabled link-flap Disabled l2ptguard Disabled psecure-violation Disabled gbic-invalid Disabled Timer interval: 300 seconds Interfaces that will be enabled at the next timeout:
Command rejected: Not eligible for secure port
If you have this error message “Command rejected: Not eligible for secure port.” it means that you first must set the port to the access mode.
SW4(config)#int f0/4 SW4(config-if)#switchport port-security Command rejected: Not eligible for secure port. SW4(config-if)#switchport mode access SW4(config-if)#switchport port-security
and that’s it.
How to set the time on routers or switches
Either on a switch or a router use clock set HH:MM:SS day MON YEAR:
Device#clock set 14:20:00 12 JUN 2014
To view the time use show clock:
Device#show clock 14:22:43.531 UTC Thu Jun 12 2014
If you want to be sure that the time is approximatively exact use a syslog server (tftpd 32) to check it. I have ~2 seconds difference between the router’s time and a computer’s time.
Sys Log Time
here you will see it much clearer:
SysLog Time 02
Using CCP (Cisco Configuration Professional) I have used the PC to synchronize the time on the deive.
These are the commands:
clock timezone PCTime 2 0 clock summer-time PCTime date Mar 30 2003 3:00 Oct 26 2003 4:00
On reload it will synchronize with the PCTime, which has the summer hours:
- on march, 30th 2003 it is 3am, and
- on octomber, 26th 2003 it is 4am.
Verify:
R2#show clock *21:11:57.991 PCTime Sun Nov 23 2014
STP: IEEE instead of PVST
When changing STP modes back to default it shows “Spanning tree enabled protocol ieee“.
The thing is that the ping between two hosts in different vlans with router on a stick configurations is not working anymore.
Off course, then I have checked the ping from the router to the hosts and they worked. I have turned to the first host, re-pinged the second host, and it worked.
The ping from second host to the first host was working since I have changed the spanning-tree to pvst.
SW3(config-if)#spa mode pvst
SW3(config)#do sh spa vl 20
VLAN0020
Spanning tree enabled protocol ieee
Root ID Priority 32768
Address 001f.c958.1a80
Cost 19
Port 22 (FastEthernet0/22)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32788 (priority 32768 sys-id-ext 20)
Address 0019.563a.9580
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/3 Desg LRN 19 128.3 P2p
Fa0/13 Desg LRN 19 128.13 P2p
Fa0/22 Root LRN 19 128.22 P2p
Skill Based Assessment Packet Tracer Environment Check