One of my favorites :-). What does it do ? :-)
On Sun, Dec 1, 2013 at 7:33 AM, Joe Sanchez <[email protected]> wrote: > Use the backdoor command for the particular network you want to be seen as > better from the igp. > > Regards, > Joe Sanchez > > ( please excuse the brevity of this email as it was sent via a mobile > device. Please excuse misspelled words or sentence structure.) > > On Nov 30, 2013, at 9:12 PM, Narendra Naukwal <[email protected]> > wrote: > > > Hi Imran, > > > > Yes that is what I exactly meant. > > Distance in BGP is used for competing with other protocols only. In > other routing protocols (like EIGRP) distance can be tweaked to choose > internal over erxternal, however, that is not the case with BGP. > > External routes are always preferred over internal & this is not based > on distance. > > Here is a detailed analysis of why router selected external path: > > > > > > 4#show ip bgp 1.1.1.0 > > BGP routing table entry for 1.1.1.0/24, version 4 > > Paths: (2 available, best #2, table Default-IP-Routing-Table) Advertised > to update-groups: 1 12 10.0.0.1 from 20.0.0.3 (20.0.0.3) Origin > IGP, metric 0, localpref 100, valid, internal 12 20.0.0.2 from 20.0.0.2 > (20.0.0.2) Origin IGP, localpref 100, valid, external, best > Comparing two paths as per the BGP path selection process. Comparing path 1 > with path 2: Both paths have reachable next hops Both paths have a WEIGHT > of 0 Both paths have a LOCAL_PREF of 100 Both paths are learned Both paths > have AS_PATH length 1 Both paths are of origin IGP Both paths have the same > neighbor AS, 12, so comparing MED. Both paths have a MED of 0 Path 2 is > better than path 1 because an external path is preferred over an internal > path. {Not because of distance but because the protocols developers wanted > it to be this way :)} This is the reason that the best path is #2As per the > BGP best path selection process, External is preferred if all the above > > parameters are same. > > > > Thanks, > > Narendra > > > > > > > > > > > > On Sunday, 1 December 2013 3:01 AM, Marko Milivojevic < > [email protected]> wrote: > > > >> changing AD of ebgp to 201 forces ibgp routes...to get into the > routing table..... > > > > Imran - this statement is not correct. > > > > > > -- > > Marko Milivojevic - CCIE #18427 (SP R&S) > > Senior CCIE Instructor / Managing Partner - IPexpert > > :: Free Video Training: http://youtube.com/IPexpertInc > > :: Social: http://twitter.com/@icemarkom | http://fb.me/ccie18427 > > :: IPexpert: http://www.ipexpert.com/Communities | +1-810-326-1444 > > _______________________________________________ > > Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: > > > > iPexpert on YouTube: www.youtube.com/ipexpertinc > _______________________________________________ Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: iPexpert on YouTube: www.youtube.com/ipexpertinc
