Thanks Chris.
Your information is very useful.
Another question is, how can I know the IDB number for each IOS version? Any
place I can find such info?
Many thanks to you.
"Chris McCoy" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> There's an undocumented command for showing the IDBs:
>
> [---Snip from Phrack 56---]
>
> @sh idb
>
> This command shows the hardware and software interface
> databases.
> this is cisco's way of keeping track of how many
> interfaces are present
> on the system.. includes hardware and software
> interfaces (physical,
> subinterfaces etc). there is a software limit of 1024
> i believe in
> ios 11 and 2048 in ios 12. this is a global limit for
> the router.
>
> output:
>
> ctalkb#sh idb
>
> 19 SW IDBs allocated (2296 bytes each)
>
> 9 HW IDBs allocated (4008 bytes each)
> HWIDB#1 1 FastEthernet0/0 (Ether)
> HWIDB#2 2 Serial2/0:0 (Serial)
> HWIDB#3 3 Ethernet3/0 (Ether)
> HWIDB#4 4 Ethernet3/1 (Ether)
> HWIDB#5 5 Ethernet3/2 (Ether)
> HWIDB#6 6 Ethernet3/3 (Ether)
> HWIDB#7 7 Serial4/0 (Serial)
> HWIDB#8 8 Serial5/0 (Serial)
> HWIDB#9 9 Loopback0
>
> Have fun...
>
> Chris M.
>
> --- Katson PN Yeung <[EMAIL PROTECTED]> wrote:
> > Dear all,
> >
> > When reading Caslow's book, there is a term called
> > IDB (Interface Descriptor
> > Block). It specifies the max number of interface the
> > router can have.
> >
> > Anyone knows which IOS command can check the IDB
> > number of a router?
> >
> > Thanks.
> >
> >
> > _________________________________
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