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- About atef yamin
08-18-2017
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Member since
03-04-2010
26
Posts
7
Helpful
0
Solutions
06-23-2015
03:26 AM
Hi Vinod, you just explainedthe problem. I am looking for the answer :) How about a software that can proxy the data through. I think riverbed's packet analyzer has the ability to be fed a continuous stream of packets. I am looking to get info from someone who has fot this solved. Thanks
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06-22-2015
07:05 PM
Hi all, I am currently using PRTG for my network monitoring and I rely on SNMP or Netflow. Having said that, i dont believe that either of above are actually real time (please correct me if I am wrong). What do you use or what do you recommend for accurate real time bandwidth monitoring. I dont want averages, I am looking for real time data. a spike that takes place only for 500 millisecond (very typical of TCP windowing) thus causing network choke for my voice traffic is not captured by SNMP or Netflow. I believe that there must be a software/hardware that can proxy the traffic and provide accurate stats on it. what do you recommend? Thanks,
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- Tags:
- bandwidth
- monitoring
Labels:
01-20-2014
07:15 PM
Hi, I am running into a very odd situation. One of our highly critical systems (172.18.1.2/16) is losing connection intermittently for brief periods of time (1minute, 3 minute, 50 seconds and so on). I have gathered some information that I would like to share with you guys: The switch is a 3560 (Show version is in ShowVersion.txt) default gateway is 172.18.10.254/16 (virtual IP in an HSRP , packet capture is done on the active node) I have noticed that pings to one of the default gateways drop infrequently (more frequently from machines on 172.18.0.0/16) segment. total number of machines on 172.18.0.0/16 do not exceed 200 I have captured packets on Interface Vlan1 and I found something very weird, perhaps pointing to a routing loop??? (see capture.png) The ICMP request comes and hits the 172.18.10.254 with TTL of 128 TWICE! then packet capture shows that same packet with TTL decremented by one TWICE! again and again until it reaches TTL of 1 and then it responds with a reply. At times it completely ignores the requests and causes a request timed out. I am confused and need help in right direction. I really appreciate it. can you also confirm if the multiple packets mean routing loop somewhere? Thanks
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01-20-2014
08:46 AM
There you go, SORRY! Cisco IOS Software, C3560E Software (C3560E-UNIVERSALK9-M), Version 12.2(50)SE2, RELEASE SOFTWARE (fc2) Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Fri 15-May-09 22:11 by nachen Image text-base: 0x00003000, data-base: 0x02400000 ROM: Bootstrap program is C3560E boot loader BOOTLDR: C3560E Boot Loader (C3560E-HBOOT-M) Version 12.2(44r)SE3, RELEASE SOFTWARE (fc3) Torsaa-mls1 uptime is 8 weeks, 4 days, 16 hours, 26 minutes System returned to ROM by power-on System image file is "flash:c3560e-universalk9-mz.122-50.SE2/c3560e-universalk9-mz.122-50.SE2.bin" License Level: ipservices License Type: Permanent Next reload license Level: ipservices cisco WS-C3560E-48TD (PowerPC405) processor (revision L0) with 122880K/8184K bytes of memory. Processor board ID FDO1447Y1JL Last reset from power-on 16 Virtual Ethernet interfaces 1 FastEthernet interface 52 Gigabit Ethernet interfaces 2 Ten Gigabit Ethernet interfaces The password-recovery mechanism is enabled. 512K bytes of flash-simulated non-volatile configuration memory. Base ethernet MAC Address : E0:5F:B9:3C:9E:00 Motherboard assembly number : 73-11179-14 Motherboard serial number : FDO14480AXG Model revision number : L0 Motherboard revision number : A0 Model number : WS-C3560E-48TD-E Daughterboard assembly number : 800-29737-01 Daughterboard serial number : FDO14470SUG System serial number : FDO1447Y1JL Top Assembly Part Number : 800-28930-04 Top Assembly Revision Number : B0 Version ID : V05 CLEI Code Number : COMCJ00ARB Hardware Board Revision Number : 0x00 Switch Ports Model SW Version SW Image ------ ----- ----- ---------- ---------- * 1 54 WS-C3560E-48TD 12.2(50)SE2 C3560E-UNIVERSALK9-M
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01-20-2014
07:47 AM
Hi, I am trying to capture traffic for a particular VLAN. I tried to do the following: Torsaa-mls1(config)#monitor session 2 source interface vl Torsaa-mls1(config)#monitor session 2 source interface vlan1 ^ % Invalid input detected at '^' marker. ..... So VLAN are not supported. Is there any other way to accomplish this? Thanks
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10-09-2013
03:54 PM
Hi All, I am planning to purchase two network expansion modules for my 3560x switches. I have been looking at C3KX-NM-1G= -- > http://www.cdw.com/shop/products/Cisco-expansion-module-4-ports/2089752.aspx I need to purchase few sfp's for it (i have orange fiber cable i assume that is SX fiber). I need to get high quality SFP modules since it will be going into my core switches. Can someone please suggest a high quality sfp module preferrably manufactured by Cisco. (P.S. Gigabit modules are what I am looking for) I would really appreciate it. Thanks
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Created by
atef yamin
in Email Security
in Email Security
02-13-2013
07:26 AM
02-13-2013
07:26 AM
Hi All, We have Ironport C150 and are getting lots of emails with attachments (archive type) that contain .exe viruses. Can anyone help me implement a filter where i can strip off the attachments that 1- are archive AND 2- contain .exe files much appreciated
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02-07-2013
05:20 AM
Hi all, We are about to implement MPLS between our sites and one of the topics under discussion is QoS. Are there any MPLS-Specific configurations on the customer side ? Would a simple DSCP marking work? based on my understanding so far the EXP bits are read from the DSCP bits. so is setting the DSCP bits enough on a customer side? Regards
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Labels:
12-28-2012
02:45 PM
The dhcpnak messages are responses to dhcprequests. The main question here is what do the flags on dhcprequest packets look like. If the client decides to set the BROADCAST flag on the dhcprequest packets to '1', which specifies to servers and relay agents to reply as Broadcast then your relay agent will reply back as Broadcast. So let us know what do the dhcprequests look like and then we will go from there. HTH
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12-27-2012
08:42 PM
Just saw this link: http://www.cisco.com/en/US/docs/ios/12_3/interface/command/reference/int_s3g.html " Number of times an interface has been completely reset. This can happen if packets that were queued for transmission were not sent within several seconds. On a serial line, this can be caused by a malfunctioning modem that is not supplying the transmit clock signal or by a cable problem. If the system notices that the carrier detect line of a serial interface is up, but the line protocol is down, it periodically resets the interface in an effort to restart it. Interface resets can also occur when an interface is looped back or shut down."
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12-27-2012
11:26 AM
Hey Matthew, Without show commands or running config it will be tough to say what happened. Provide the running config for the switches, or their HSRP configurations as the log is showing HSRP change. Atef
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12-26-2012
11:47 AM
you will not need the vpdn-group or vpdn enable commands. You will simply use the interface pppoe-client dial pool command. HTP Regards
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12-26-2012
11:08 AM
check this link, this may give you some insight,, i believe 12.4(24)T has the option. http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ftpprfls.html May be someone else can shed some more light too HTP Regards
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12-26-2012
10:48 AM
Hi Teymour, Under the new IOS's you dont need to use vpdn to support the pppoe clients. simply use enable command under the interface: pppoe-client dial-poo-number you should also look into bba-group configurations should you require more sessions. HTH Regards
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06-23-2015
Hi Vinod,you just explainedthe problem. I am looking for the answer
:)How about a software that can ...
06-22-2015
Hi all,I am currently using PRTG for my network monitoring and I rely on
SNMP or Netflow.Having said...
Created by
atef yamin
in Switching
01-20-2014
01-20-2014
Hi,I am running into a very odd situation. One of our highly critical
systems (172.18.1.2/16) is los...
01-20-2014
There you go, SORRY!Cisco IOS Software, C3560E Software
(C3560E-UNIVERSALK9-M), Version 12.2(50)SE2,...
01-20-2014
Hi,I am trying to capture traffic for a particular VLAN. I tried to do
the following:Torsaa-mls1(con...
10-09-2013
Hi All,I am planning to purchase two network expansion modules for my
3560x switches.I have been loo...
Created by
atef yamin
in Email Security
02-13-2013
02-13-2013
Hi All,We have Ironport C150 and are getting lots of emails with
attachments (archive type) that con...
02-07-2013
Hi all,We are about to implement MPLS between our sites and one of the
topics under discussion is Qo...
12-28-2012
The dhcpnak messages are responses to dhcprequests. The main question
here is what do the flags on d...
12-27-2012
Just saw this
link:http://www.cisco.com/en/US/docs/ios/12_3/interface/command/reference/int_s3g.html...
12-27-2012
Hey Matthew, Without show commands or running config it will be tough to
say what happened. Provide ...
12-26-2012
you will not need the vpdn-group or vpdn enable commands. You will
simply use the interface pppoe-cl...
12-26-2012
check this link,this may give you some insight,, i believe 12.4(24)T has
the
option.http://www.cisco...
Public Statistics
| Date Registered | 03-04-2010 10:42 PM |
| Date Last Visited | 08-18-2017 03:56 AM |
| Total Messages Posted | 26 |
| Total Helpful Votes Received | 7 |
