Author: Chris
CAR(Committed Access Rate) ?
Tweet Committed Access Rate (CAR) is used to rate limit traffic. In this example, all ICMP traffic that exceeds the defined level will be dropped….
Random Early Detection (RED)?
Tweet Random Early Detection (RED) is a congestion avoidance mechanism that takes advantage of TCP’s congestion control mechanism. When it comes to Quality of Service,…
Issue on Cisco GigE port with FastEthernet port on 3Com switches
Tweet As you know, Cisco Systems is one of top vendor in Router and Switch market in the world since early 90’s. If someone asks who …
[Cisco] How to limit a rate on interface ?
Tweet The command ‘rate-limit’ is interface configuration command. It is used to setup a committed access rate (CAR) and distributed CAR (DCAR) policies. To remove…
Internet Speed Issue – How to troubleshoot(IPERF)
Most of the cases, FTP testing would be enough to isolate an issue if existed. However, sometime you need more deep testing and detailed output…
Internet Speed Issue – How to troubleshoot(FTP)
From previous article, Bandwidth VS. Throughput, now you can determine whether your throughput is on trouble or not. It means your Internet connection is slower…
Easy QoS 101 – What is QoS(Qaulity of Service)
Tweet QoS(Qaulity of Service), it is definetly one of hot topic in IT fields. Economically, most companes are suffering in thesedays. IT budget got cut…
Error message “%ATMPA-3-TXDMANOTFLUSHED: TX DMA not flushed
Question: Hey, I got error message on log, please guide me what would be a problem here. %ATMPA-3-TXDMANOTFLUSHED: TX DMA not flushed Answer:…
NSE and PSE on SONET interface
Question; Hi, I saw NSE and PSE counts are increasing big time on our SONET interface. My Cisco has 1 OC12 POS controller with 12.2…
Modifying Access list and Prefix list
Question: Modifying Access list and Prefix list Any one knows how to modify and update a HUGE access list and prefix list on Cisco router…
Many “runts” are being detect on Ethernet interface ?
Tweet Question: Many “runts” are being detect on Ethernet interface ? Answer: It could be duplex mismatching issue. First of call, Runts: These are…
What is Alignment Errors ?
What Are Alignment Errors? Understanding Alignment Errors Alignment errors occur when frames received do not end on an even number of octets and have a…
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