Here is some mail you may not have received due to a malfunction with our mail virus scanner. We apologize for the inconvenience. [EMAIL PROTECTED] -----Ursprungligt meddelande----- Från: Nigel Taylor [mailto:[EMAIL PROTECTED]] Skickat: den 25 september 2000 01:36 Till: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Kopia: [EMAIL PROTECTED] Ämne: RE: BGP **** CCO QUESTION Solved...! Well I figured I took do with the pratice. After a couple of slip-ups I think I finally got it right. In mocking this up on my lab I've come to two conclusions. The only way I got routerA to advertise 10.1.0.0/24 was witht he command "network 10.1.0.0 mask 255.255.255.0" I attempted to use the 10.1.0.0 network command but this did nothing to advertise the subnet in BGP. I tried a couple variations of the command and nothing meet the requirements of the question. Also, the only way that the route was advertised was by the configuration of the loopback 0 interface, listed is the main config statements; nterface Loopback0 ip address 10.1.0.1 255.255.255.0 no ip mroute-cache ! interface Ethernet0 ip address 152.1.1.1 255.255.255.0 no ip mroute-cache no mop enabled ! interface Serial0 ip address 192.1.1.1 255.255.255.0 no ip mroute-cache ! router bgp 100 no synchronization <--this is optional as it applies to the problem bgp log-neighbor-changes network 10.1.0.0 mask 255.255.255.0 network 152.1.0.0 network 192.1.1.0 2501_RouterA#sh ip bgp BGP table version is 4, local router ID is 10.1.0.1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> 10.1.0.0/24 0.0.0.0 0 32768 i *> 152.1.0.0 0.0.0.0 0 32768 i *> 192.1.1.0 0.0.0.0 0 32768 i So based on this it would seem that the question does not provide us with a correct option. as called for in the question "10.1.0.0/24" Anyone else took a look at this.. Or got it work any other way? Nigel. >From: "Chuck Larrieu" <[EMAIL PROTECTED]> >Reply-To: "Chuck Larrieu" <[EMAIL PROTECTED]> >To: "Jay Hennigan" <[EMAIL PROTECTED]> >CC: "Peter Abraham" <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]> >Subject: RE: BGP **** CCO QUESTION ** PA >Date: Sun, 24 Sep 2000 09:21:44 -0700 > >Saved this one until I could take a look on a router. Some comments within: > > >1. Which command allows Router A to advertise subnet 10.1.0.0/24 in BGP? > > > > A. network 10.1.0.0 > > B. network 10.1.0.0 255.255.0.0 > > C. network 10.1.0.0 mask 255.255.0.0 > > D. network 10.1.0.0/16 >* E. network 10.1.0.0 prefix 16 > >We've already determined that B, D, and E are illegal commands > >A, which I mistakenly believed would work does not do anything on my >router. > >Router_3#sh ip bgp >BGP table version is 7, local router ID is 3.3.3.3 >Status codes: s suppressed, d damped, h history, * valid, > best, i - >internal >Origin codes: i - IGP, e - EGP, ? - incomplete > > Network Next Hop Metric LocPrf Weight Path >*> 192.167.9.0 0.0.0.0 0 32768 i >*> 199.199.199.0 0.0.0.0 0 32768 I > >IP Classless was configured. > >Relevant parts of the config: > >interface Loopback0 > ip address 10.1.1.1 255.255.0.0 >! >interface Loopback1 > ip address 192.167.9.1 255.255.255.0 >! >interface Loopback4 > ip address 199.199.199.1 255.255.255.0 > >router bgp 100 > no synchronization > bgp router-id 3.3.3.3 > network 10.1.0.0 > network 192.167.9.0 > network 199.199.199.0 >! >ip classless >ip route 0.0.0.0 0.0.0.0 Serial1 > >yes I did a clear ip bgp * between config changes > > >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Jay >Hennigan >Sent: Monday, September 18, 2000 7:20 PM >To: Chuck Larrieu >Cc: Peter Abraham; [EMAIL PROTECTED] >Subject: RE: BGP **** CCO QUESTION ** PA > >On Mon, 18 Sep 2000, Chuck Larrieu wrote: > > > Having just exited a three day Global Knowledge class on BGP, let's see >if > > anything sunk through this thick skull of mine. Comments in line. > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of > > Peter Abraham > > Sent: Thursday, September 14, 2000 2:02 PM > > To: [EMAIL PROTECTED] > > Subject: BGP **** CCO QUESTION ** PA > > > > All these are questions that I got from the CCO BCSN tests. > > > > 1. Which command allows Router A to advertise subnet 10.1.0.0/24 in BGP? > > > > A. network 10.1.0.0 > > B. network 10.1.0.0 255.255.0.0 > > C. network 10.1.0.0 mask 255.255.0.0 > > D. network 10.1.0.0/16 > > E. network 10.1.0.0 prefix 16 > > > > I have my answer as A. B,D, and E all have the wrong syntax. Is C >right? >I > > know that the mask length for C is 16. > >Jay H:I would choose C. The wording of the question is "allows Router A to >advertise". Note that none of the answers LIMIT the advertisement to >just the subnet 10.1.0.0/24. If no mask is specified, BGP assumes a >classful network. Answer A has no mask, so should properly be written >"network 10.0.0.0". C is the only properly-formatted answer which >would allow the /24 subnet. It would also allow any other subnets of >10.1.0.0/16 to be advertised, which is ok. > >CL: folks as literal minded as myself often outsmart themselves with >questions like this. Kinda like my network 0.0.0.0 255.255.255.255 area 0 >or >network 172.16.1.1 172.16.1.1 area 0 propositions in OSPF. There is an >answer that does what the question asks, plus a whole lot more. > >Note: even assuming BGP defaults to the classful boundary, the network >10.0.0.0 does NOT appear in the BGP table if the network statement >indicates >10.1.0.0 > ><<snip for brevity>> > >**NOTE: New CCNA/CCDA List has been formed. For more information go to >http://www.groupstudy.com/list/Associates.html >_________________________________ >UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html >FAQ, list archives, and subscription info: http://www.groupstudy.com >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. 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