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New Member

Troubleshooting interfaces

Hi,

Can anyone give give me pointers as to which direction does an output queue drop and 2)input queue drop happen for a serail interface (ie for traffic coming in from WAN=input queue for serial and traffic leaving the serial outwards onto WAN =output ...What does input queue drops on a serial interface signify..i have seen some documents on cisco site but im not clear as to the direction of the packet flow for an input and output queue for 1)Serial interface

The direction of packet flow for

1)Input queue for ethernet interface

2)output queue for ethernet

Help would be appreciated

regards

3 REPLIES

Re: Troubleshooting interfaces

Hi,

AFAIK input means always direction from the line TO the router in Cisco.

So input queue on serial interface means data coming from WAN to the router, input queue on an Ethernet interface means data coming to the router from LAN. Output is the opposite direction.

Why are packets dropped on your serial interface? Difficult question. You should provide some details about your router configuration.

What is the router type, memory , IOS, serial interface encapsulation, line bandwith and load, etc., etc.?

Is there something suspicious in syslog or sh int, sh controller output?

Regards,

Milan

New Member

Re: Troubleshooting interfaces

Hi,

What wud be the most significant observation seeing the output of a sh interface reliability,load,packet drops ??

regards

New Member

Re: Troubleshooting interfaces

everything what you see on the sh interface commnd has significance ... it just depends on the problem you are trying to solve (or prevent)......

there is a cisco website (just a little search on the sh int command shd do it) url and that would give you a good understanding of all the counters that you see on the sh int

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