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Resolved! Router and L3 switch

Hello,I'm pretty new in Cisco (still preparing for CCNA), so be understanding if question is obvious.I just don't understand what is a difference betweet router with integrated L2 switch (for example 877) and Layer 3 switch ?I cannot find it anywhere...

mkoniuszko by • Level 1
  • 3635 Views
  • 11 replies
  • 0 Helpful votes

High Speed Fan Tray Log Entries

Recently upgraded to Sup720s w/ 3000w power supplies,high speed fan trays and new line cards in a 6509 chassis. I'm receiving the following log messages:--- Version 1 low-output fan-tray is in effect.--- Module 2 cannot be adequatley cooled--- Module...

Resolved! crashinfo file on 6509 with sup 32 and 720

Hi all,On 6509  with dual sup 32 and 720 is crashinfo file is enabled by default  on the running configordo we need to configure this option on switch.How can we check in running config if crashinfo is configured or not ?ThanksMahesh

mahesh18 by • Level 6
  • 4092 Views
  • 9 replies
  • 0 Helpful votes

High Cpu Utilization-4506

hiI am facing high cpu utilization problem on my cat 4506E switch in which in betwene the utilization goes up to 45-50% and then automitacally comes down.Software version on the switch is 12.2.53(SG2)as per the show proc cpu output one of teh process...

Resolved! qos and packet reception on the int

Hi every body.Based on the last discussion based on the somewhat similar topic( it was how the routers pick picket to transmit out of int), i learnt following.Congestion does not necessary mean that link is congested,  for example if router receives ...

sarahr202 by • Level 5
  • 440 Views
  • 1 replies
  • 0 Helpful votes

Nexus 7k and L3 peering

Hi,I have a few questions related to the method of L3 peering between N7k and a generic L3 device (let's say it is a router) - the idea is to connect N7k to the core network. The current design is based on Cat6k switches (they are the core of my netw...

Resolved! Questions for PVST & MSTP interoperability

Hi,Here’s output of “show spanning root”:       PVST+ configured on two C6509 switches:                                         Root Hello Max FwdVlan                   Root ID          Cost  Time Age Dly  Root Port---------------- ------------------...

Resolved! throughput question

Hi my friends;  I have question regarding throughput , let's say for example if I have 20M link, it doesn't mean that i can download 1 GBit file in 50sec, The throughput equation I've found is “Max TCP throughput = RCV buffer size / RTT =? bps “ ·  ...

mkamar by • Level 1
  • 1125 Views
  • 3 replies
  • 0 Helpful votes

Cat6500 sup720 with strange trace-back messages

We have a 6500 with two symptoms. Don't know if these are related1. sup-bootdisk: lists as empty but space is consumed.Directory of sup-bootdisk:/ No files in directory 512024576 bytes total (429498368 bytes free)show file systems snippet*  512024576...

3G router Hang

We have a problem for a router with 3G HWIC. When the GSM network is down, the router hang after 40 min.We could not access the router and we  have to power off and on the router to work again.Is it solved in some IOS release, or it is a configuratio...

Loss of license information in ISR gen 2

In the ISR gen 2 routers the activation license is held in a secure area of NVRAM. How secure is this? In particyular is it safe from accidental erasure during such tasks as erasing configs or deleteing other files, for example accidentally entering ...

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