Re: [ns] Question on IFQ of mobile node

[Satish Kumar <kkumar@isi.edu>]

Unfortunately, I dont think there's a method to directly obtain the queue size 
of a mobilenode. You may have to look at ways to attach queue monitor objects 
around the IFQ. Look at tcl/lib/ns-link.tcl for some ideas on attaching queue 
monitor objects.

Satish


> Hi Haobo,
> I simulate a wired+wireless network including mobile-ip. I saw some packets
> dropped because of no buffer space in IFQ of the mobile node. I set the
> size of ifq for the mobile node (ifqlen option) to 50 packets. But just
> after 10th packet, one packet is dropped after every two packets sent
> because of no buffer space. Do you think it is a bug ?. I use the latest
> version of daily snapshot.
> 
> Then I increased the ifqlen option but I still get the same problem. Liu
> liqun and Rohit ( people on ns-user mailing list) suggested me to use
> "Queue set limit_ " to change the size of the queue but the result doesn't
> change. I want to use queue monitor to see the ifq size in packet. But I
> can only use queue monitor on a wired link. Do you know is there any way to
> check the the size of ifq of a mobile node?.
> Could you please help
> 
> Thank you very much,
> Cindy
>  
> Diepchi Tran 
> Phone (216) 433-8861
> Fax   (216) 433-8705