2014年1月22日星期三

Fault processing methods of the Cisco switches and Cisco routers

Fault processing method
One, network complexity
The general network, dial, including video, (ISDN, WAN, frame relay, ATM,... ), LAN, VLAN,...
Two, failure model
1, the definition of the problem (Define the Problem)
Detailed and accurate description of fault symptoms and potential causes
2, collecting detailed information (Gather Facts) R> source of information: the key to the user, the network management system, the router / machine
1) identify symptoms:
2) to reproduce the fault: check the fault still exists
3) to investigate the failure frequency:
4) range to determine the fault: there are three kinds of methods to establish the scope of fault
From the outside to inside? Treatment failure (Outside-In Troubleshooting): generally applicable to a plurality of host can not be connected to one or a set
1,from the inside to the outside fault treatment (Inside-Out Troubleshooting):
2,half fault treatment (Divide-by-Half Troubleshooting)
3,consider possibilities (Consider Possibilities) to consider possible reasons causing thefailureset up a plan of action (Create the Action Plan)
4,implement the action plan (Implement the Action Plan)
5,Is used to correct the cause of network fault. From the fault source, come up with treatmentfor each completed step, check whether the failure to solve
6, observe the action plan execution result (Observe Results)
7, if the action plan will not solve the problem, repeat the above process (Iterate as Needed)
Three, record the changes
In the plan of action to solve the problem, the part of the record as the fault processing,recording all the configuration changes.
The second chapter web documents
A, network baseline
The simplest way to solve network problems is the current configuration and the previous configuration compared.
Baseline document consists of a network and system documents is different, it includes:
Network configuration table?
Network topology?
The ES network configuration table?
ES network topology?
Considerations for creating a network:
1) to determine the scope of the document;
2) remain the same: the same information collection of all equipment in the network;
3) clear goal: to understand the use of the document;
4) documents are easy to use and access;
5) timely update the document.
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2014年1月21日星期二

Copy Configuration of Cisco Switch to Another, How to do?

I have to deploy one more Cisco Catalyst 2960 to our network... what i wanted to do is just copy the config file of another 2960- which is already on the network, and just change the ip address after that. My problem is I forgot how to do it using ftp.. I have filezilla client and server, as well as tera term. I had used filezilla once to download config from one of our switch, but i forgot the steps. And I'm confuse which one I will use to download the config, filezilla client or file zilla server?... Or can I just copy and paste the output of the config from my teraterm?

The solution:
1 You can copy the config from the first switch to the FTP server and then from the FTP server to the second switch. Be sure the second switch isn't connected to the network, but instead with a direct connection to the FTP server. Otherwise, you will have network problems with both switches having the same IP address.

2 FTP / TFTP or copy / paste using Notepad and PuTTY / Tera Term etc is the easiest way. Saving to a thumb drive just adds an extra two steps that aren't required. And none of the 2900 series switches have USB ports anyway... well not for that anyway. New 2960's such as WS-C2960S-24TS-L have mini-USB ports for the new USB console cables.

3 I have a trick to offer that will help with editing your file in the copy/paste route.
Once in global config mode, type:
term length 0
show run
What that does is prints the entire config from top to bottom, without the "press enter to continue" messages in the middle. Once it's done, you put it back with:
term length 24

If you don't put it back, scrolling is permanently off. Hope that's useful.

2014年1月13日星期一

Cisco WS-C4507R Connect a Cisco IP Phone

We have a Cisco WS-C4507R, just need some clarification if this switch is capable of poe.
we tried connecting a cisco ip phone and it would not power up, tried on serveral ports. is there some global config to turn POE on. Below are some show command outputs.

show power inline
Available:1400(w)  Used:0(w)  Remaining:1400(w)

Interface Admin  Oper            Power(Watts)     Device              Class
                            From PS    To Device                   

Totals:          0    on    0.0        0.0      


show power

Power                                             Fan      Inline
Supply  Model No          Type       Status       Sensor   Status
------  ----------------  ---------  -----------  -------  -------
PS1     PWR-C45-2800AC    AC 2800W   good         good     good  
PS2     PWR-C45-2800AC    AC 2800W   good         good     good  

Power supplies needed by system    : 1
Power supplies currently available : 2

Power Summary                      Maximum
 (in Watts)              Used     Available
----------------------   ----     ---------
System Power (12V)        308        1360
Inline Power (-50V)         0        1400
Backplane Power (3.3V)     40          40
----------------------   ----     ---------
Total                     348        2800


show module
Chassis Type : WS-C4507R

Power consumed by backplane : 40 Watts

Mod Ports Card Type                              Model              Serial No.
---+-----+--------------------------------------+------------------+-----------
 1     2  Supervisor IV 1000BaseX (GBIC)         WS-X4515           JAE07460HNP
 3    48  10/100/1000BaseT (RJ45)                WS-X4548-GB-RJ45   JAE07460MH6
 7    48  1000BaseX SFP                          WS-X4448-GB-SFP    JAE1123KYM9

 M MAC addresses                    Hw  Fw           Sw               Status
--+--------------------------------+---+------------+----------------+---------
 1 0007.0e34.1700 to 0007.0e34.1701 3.0 12.1(12r)EW  12.2(25)EWA6     Ok      
 3 000e.38fb.0c00 to 000e.38fb.0c2f 1.0                               Ok      
 7 001b.d546.9ab0 to 001b.d546.9adf 1.3                               Ok      

Mod  Redundancy role     Redundancy mode     Redundancy status
----+-------------------+-------------------+-------------------
 1   Active Supervisor   Non redundant       Active

The chassis can support PoE, but the blade can't. The model number will have a V in it that indicates PoE (WS-X4548-GB-RJ45). Here is an example of one: WS-X4548-RJ45V+.

2014年1月8日星期三

Question of Upgrading Cisco 3750 Firmware

One of my Cisco 3750X switches firmware is outdated can I copy it from another 3750 switch on my LAN which got the latest firmware and use it on the outdated one. I got a Cisco support contort but cannot currently login due to problems.

The answer:
Yes you should be able to run the command "copy flash:/nameofimagefile tftp" to copy the bin file of the IOS to a TFTP server. From there you will need to connect to the switch that is running the outdated firmware and run the command "copy tftp flash" Be sure that both switches are able to ping your TFTP server and you should be good to go.

That's not means it wont make any problems because image is coming from another switch (same module ofcause) in LAN no license attached to image. You won't run into any issues. The IOS you would download from Cisco's website should you  be able to sign in to it would be identical to the IOS that you would see on your 3750 switch in your network currently.

Customers interested in purchasing Cisco 3750 or the price, visit http://www.3anetwork.com/.


2014年1月7日星期二

Configuration of Cisco 2901 line 2 port 2002

I have a vulnerability scan performed by an outside vendor. My Cisco 2901 keeps getting flagged for having port 2002 open, which is a common port for some worms or something.
After doing some research I think that port 2002 is associated with line 2. Does anyone know how to close/remove this port and make some changes to line 2 so this port doesnt show up on my vuln scans?
line 2
 no activation-character
 no exec
 transport preferred none
 transport input all
 transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
 stopbits 1
how would I find out if I'm using it. How would I disable it?

The solution:
Show Run" output will display the Line 2 configuration.
"Show Line" displays Line2 to details.

To disable Line 2 completely.
R1(config)#line 2
R1(config-line)#transport input none
R1(config-line)#end

Your config will look like
line 2
 transport input none
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2014年1月2日星期四

Cisco 6509 Switch: Hardware Question

I have just recently taken over Cisco duties at work.  I'm having a hard time with interpreting the hardware specs of a module we have on our 6509 switch.  The module we have is a WS-X4624-SFP-E.  I need to know if this module can be used to connect to a Dell Compellent (which requires Twinax SPF+ cables).

If someone could help me figure this out (and tell me where you found this information) I would really appreciate it.

The solution:
The module you reference is a bit older 10G module that uses a xenpak to supply a MM SC fiber interface. A xenpak is basically the predacessor to the SFP+. Which Compellant are you connecting to? Most will take a SFP+ that will have an LC connector for fiber then you would use an OM3 or OM4 LC to SC MM fiber to patch them together.

More information about the SFP or the modules WS-X4606-X2-E, please visit http://www.3anetwork.com.



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