About d.serra

d.serra · 06-18-2011

Hey Guys,I'm taking a practice lab for my CCIE and I'm stumped with a basic. Can anyone tell me why I would get 'Encapsulation failures' during a ping when I have defined specifically a DLCI on the frame-relay interface with the 'frame-relay interfa...

d.serra · 12-23-2010

Hey Guys,Having a problem with 'ip nat outside source static'. When a client on the outside of the NAT router tries to ping the server on the inside, I can see that traffic to the destination is NATted but return traffic is not being unNATted which ...

d.serra · 11-26-2010

Hey Guys,I've been trying to figure out the following configuration and it is starting to make my brian hurt. Specifically is the 'threshold' value for the 'wrr-queue cos-map' command. For example, below we see the command 'wrr-queue cos-map 2 6 0 ...

d.serra · 04-23-2010

Hi Guys,Quick question. Does anyone know how to NAT BOTH the source and destination IP address on a router? I've been through several articles and it looks like this functionality is reserved for the ASA firewall but was looking for confirmation.Ne...

d.serra · 04-02-2010

Hey Guys,Can anyone tell me if there is a way to check how many hardware queues a particular interface has? I'm just trying to dive into deeper understanding of the architecture and have not found much documentation from cisco on it. I've got a 374...

d.serra · 06-19-2011

Thanks guys. I was doing an IPExpert lab in GNS3 and the requirement was to not user sub-interfaces and to ensure inverse-arp was disabled. It does work with inverse-arp enabled. So I guess I'm going to just try the config again using a point-to...

d.serra · 12-01-2010

Thank you Shashank!Your explanation is very helpful. Further, it pointed out something else interesting in that drop thresholds are set on CoS values rather then queues. I used to think that you set WRED min and max values on a per queue basis but ...

d.serra · 11-26-2010

I'm sorry but I can't produce any show commands as I do not have access to the equipment. Just trying to understand the configuration.

d.serra · 05-27-2010

Milan,I think you are dead on but you math may be a bit off. Tc is 250 ms not 200ms. The reason is Bc is 400k and bps is 16k. So 16000 divided by 400 is 4 meaning that there are 4 250ms time slots transmitting 400bps (Bc). Add the 4 slots togethe...

d.serra · 05-26-2010

"I still think that I'm somehow right when what I say "LLQ cannot borrow the full bandwidth" You have set LLQ to 16k and you have 30000bps (which is about 30k) and you already have a drop of 1000bps. If LLQ is allowed to borrow as much bandwidth as i...

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frame-relay interface-dlci issues

Can't get 'ip nat outside source static' working...Please Help.

QoS on 6500

NAT on 3845 router

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frame-relay interface-dlci issues

Re: QoS on 6500

Re: QoS on 6500

Re: LLQ understanding

Re: LLQ understanding