You can also do what the former bastard network admin did at my company and disable spanning-tree and prevent your loops with lots of weird pruning of vlans and meshing of vlans through access ports. Make sure that all interfaces in each vlan have a minimum of at least 5 secondary IP addresses. Make sure to disable CDP everywhere and hide your root switches at the bottom of racks hidden by servers. You should make sure there are no good network drawings or other documentation that the next guy could use to figure out what you have done.
It's been a lot of fun figuring all this out. /end sarcasm On Thu, Dec 23, 2010 at 6:47 AM, Moath Rawashdeh <[email protected]>wrote: > > Tyson, > > The way you ruled this really makes sense. What came to my mind when I read > your response was "flex links" to support Layer 2 redundancy with STP > disabled. This soultion stills works and is valid. > > Please have a look for further details about flex links: > > > http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_55_se/configuration/guide/swflink.html > > > Cheers fellows, > > Moath rawashdeh, CCIE #26986. > > > > > > From: [email protected] > > To: [email protected]; [email protected] > > Date: Wed, 22 Dec 2010 09:41:44 -0500 > > Subject: Re: [OSL | CCIE_RS] loop prevention and redundancy > > > > Uli, > > > > what they, Jason and Khaled, have said is correct. But I will say you are > > correct and your co-workers are incorrect :). STP is a mechanism to > prevent > > loops. Network design is used to provide redundancy. If that design > > provides redundant paths then STP is used to prevent redundant paths from > > creating loops. > > > > STP = Loop prevention > > > > Regards, > > > > Tyson Scott - CCIE #13513 R&S, Security, and SP > > Managing Partner / Sr. Instructor - IPexpert, Inc. > > Mailto: [email protected] > > Telephone: +1.810.326.1444, ext. 208 > > Live Assistance, Please visit: www.ipexpert.com/chat > > eFax: +1.810.454.0130 > > > > IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, > > Audio Tools, Online Hardware Rental and Classroom Training for the Cisco > > CCIE (R&S, Voice, Security & Service Provider) certification(s) with > > training locations throughout the United States, Europe, South Asia and > > Australia. Be sure to visit our online communities at > > www.ipexpert.com/communities and our public website at www.ipexpert.com > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of Uli > > Sent: Wednesday, December 22, 2010 7:17 AM > > To: <[email protected]> > > Subject: [OSL | CCIE_RS] loop prevention and redundancy > > > > Hi Expert, > > > > Since most of my time study cisco only in lab environment (in my > > university)and now I get into real world situation, I found something > that > > bother me a lot. In my understanding STP is for loop prevention and not > for > > redundancy, right ? but why my colleague and people I met they said it's > for > > redundancy (those guys are already in this business for at least 3 years > > experience).Thus, I always argue with them..hmm am I missed something > here ? > > because for redundancy we can use HSRP, GLBP and VRRP. > > > > > > Thanks > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > > visit www.ipexpert.com > > > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
