This stuff is covered in gory detail in the Caslow book - I wouldn't
have completed my CCNP/CCDP with that.


Rich wrote:
> 
> Could someone help a CCNP student who is really confused?  I am currently
> studying for the BSCI Routing Exam using the Sybex Books on a home Lab of 4
> 2500's and 1 2600.  It has been working great and I have always been very
> pleased with the Sybex Series.  Unfortunately they have never covered
> Subinterfaces well enough and many of the Labs In the CCNP BSCI book are
> using
> them without much explanation.  They have various Labs that use OSPF,
IS-IS,
> BGP etc. to route IP over Serial Subinterfaces on what I see as just a
> "Plain
> old LAN".  All they do is show the IP Addresses and Networks already
> arranged,
> some on Serial Subinterfaces, and go right into the Routing Protocol
> configurations.  They don't say anything at this point about using a Frame
> Relay, ATM, IPX, or ISL for VLAN's on them in this book.  Those topics are
> covered in the Remote Access and Switching Books.  My problem is:  when I
> set
> up Subinterfaces on the Serial Ports with IP Addresses, set the clocking,
> and
> then bring up the interfaces, they all show as Interface Up and Line
> Protocol
> up - But I just can't seem to Ping any of the IP's on the Serial ports if
> they,
> or the other end they are attached to, are Subinterfaces.  If I can't Ping
I
> sure can't route right?  When I stick to regular physical interfaces,
> everything works great.  Am I missing something important?  If any of you
> Cisco
> Experts out there could offer any suggestions, I would hugely appreciate
> it.
> I'm kind of stuck on Stall right now and can't move on to any of the other
> Labs
> until I resolve this.  Thanks.
> 
> Rich.
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