On Thu, Oct 18, 2012 at 9:30 AM, Bob McCouch <[email protected]> wrote: > And if the grading script used "ping X.X.X.X size 1500" to test? :-)
It would still work, since packets would be fragmented ;-). On the other hand, if they added "df-bit" to that command... another story. That said - unless the lab asks for 1500-byte payload, I wouldn't bother with it. Then again, if you think rebooting a switch won't take from your time, why not do it and not worry? Just keep in mind that changing "system mtu" will change IP MTU as well, which may have impact for routing protocols running on the switch. Luckily, you can fix that without a reboot with "system mtu routing" -- Marko Milivojevic - CCIE #18427 (SP R&S) Senior CCIE Instructor - IPexpert > > How about routing adjacencies? Might OSPF get tripped up by neighbors > agreeing they have 1500 byte MTU, but not being able to actually pass 1500 > during LSADB sync? > > The devil is in those details. > > > On Thu, Oct 18, 2012 at 10:24 AM, Mills, Derek < > [email protected]> wrote: > >> Good questions Bob and I guess I need to know the answers. Perhaps my >> downfall is that I would configure it, run a few various pings to verify >> the reachability requirement, and would count those points when there are >> no other lab requirements indicating that an mtu change is warranted.**** >> >> ** ** >> >> ** ** >> >> ** ** >> >> ** ** >> >> ** ** >> >> *From:* Bob McCouch [mailto:[email protected]] >> *Sent:* Thursday, October 18, 2012 9:17 AM >> *To:* Mills, Derek >> *Cc:* [email protected] >> *Subject:* Re: [OSL | CCIE_RS] Dot1q Tunnel and MTU**** >> >> ** ** >> >> Hi Derek,**** >> >> ** ** >> >> You say "most times" and you are correct. What are the times it wouldn't >> work? How might those times bite you either while configuring later >> elements of your lab, or how they might test your solution with a grading >> script?**** >> >> ** ** >> >> We must learn the right thing to do, even if IOS doesn't warn you about >> something. :-)**** >> >> ** ** >> >> ** ** >> >> On Thu, Oct 18, 2012 at 9:01 AM, Mills, Derek < >> [email protected]> wrote:**** >> >> Most times configuring dot1q tunnel in the lab will work just fine without >> changing the MTU on the switches. What is the opinion on whether we should >> change it or not? If there is a specific task requirement for it there is >> no question, but is it expected and standard procedure just to increase it >> ALL the time when you configure it? Will you miss the points if you don't >> configure it? >> >> >> >> >> DEREK MILLS >> <>< >> >> >> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- >> Anheuser-Busch InBev Email Disclaimer www.ab-inbev.com >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> Are you a CCNP or CCIE and looking for a job? Check out >> www.PlatinumPlacement.com >> >> http://onlinestudylist.com/mailman/listinfo/ccie_rs**** >> >> ** ** >> ------------------------------ >> Anheuser-Busch InBev Email Disclaimer >> www.ab-inbev.com<http://www.ab-inbev.com/disclaimer.cfm> >> > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
