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Learning by Doing: CISCO Certified Network ... - SCN Research

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gibson#debug ipx sap ?<br />

activity IPX Service Advertisement packets<br />

activity IPX Service Advertisement packets<br />

gibson#debug ipx sap activity<br />

IPX service debugging is on<br />

gibson#<br />

00:21:23: IPXSAP: positing update to 200.ffff.ffff.ffff via Ethernet0/0<br />

(broadcast) (full)<br />

00:21:30: IPXSAP: positing update to BB.ffff.ffff.ffff via Serial0/1<br />

(broadcast) (full)<br />

00:22:23: IPXSAP: positing update to 200.ffff.ffff.ffff via Ethernet0/0<br />

(broadcast) (full)<br />

00:22:30: IPXSAP: positing update to BB.ffff.ffff.ffff via Serial0/1<br />

(broadcast) (full)<br />

gibson#undebug all<br />

Notice our SAP packets here and how often they are broadcast. These are what<br />

makes Novell a “chatty” network. Remember these SAP packets act like little<br />

children demanding attention: “Here I am! Here I am! Here I am!” Get it?<br />

Good.<br />

Supplemental Lab or Challenge Activity:<br />

1. Try adding Novell-ether as an encapsulation. Do you have to add it for every<br />

interface or is it on <strong>by</strong> default?<br />

2. Add in a third router and keep the IPX party going!<br />

3. Try switching the mask to 20 bits. What changes have to be made in your<br />

planning? Ok…now go do it!<br />

So What Have I Learned Here?<br />

In this lab you learned how to implement dynamic IPX routing along with dynamic IP<br />

routing. We just did this to make things easier even though it sounds complicated. There<br />

is not much IPX left in the “real world…” In some schools, some banks, and some<br />

companies but it seems to being dying out. Too bad…its really nice…it’s even similar to<br />

IPv6…coincidence? I think not.<br />

Guest Router Name<br />

Steve Gibson runs a nice security website: http://www.grc.com His site will scan your<br />

system (free) and tell you of any security leaks or potential port problems. His site says<br />

they will not keep any information. Heck, it’s a good start any many of my security<br />

colleagues frequently use the site.<br />

329

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