Taqdir Singh, In BGP the two neighbors will have a client/server relation, the router using the high port as source is the client and the router using the well-known port (179) as the source is the server; remember, initially they will both establish the bgp session because they both have a neighbor command configured, but later the connection that was initiated by the router with a lower RID will be torn down, so there will only be a single session between the 2 routers But yes, both routers listen to port 179, they both have the capability of becoming a server or a client. Remember that you can control as to which router becomes the client and which router becomes the server. I hope this helped.
On Tue, Aug 18, 2009 at 7:14 AM, <[email protected]>wrote: > Send CCIE_RS mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://onlinestudylist.com/mailman/listinfo/ccie_rs > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CCIE_RS digest..." > > > Today's Topics: > > 1. Re: BGP listens on TCP port 179 (prakash patel) > 2. RIP and BGP are application layer protocol (Taqdir Singh) > 3. Re: Frame Relay MultiLink Problem (Rick Mur) > 4. Re: Frame Relay MultiLink Problem (Tahir Bashir) > 5. Re: RIP and BGP are application layer protocol (prakash patel) > 6. Re: RIP and BGP are application layer protocol (Taqdir Singh) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 18 Aug 2009 09:48:46 -0400 > From: prakash patel <[email protected]> > Subject: Re: [OSL | CCIE_RS] BGP listens on TCP port 179 > To: <[email protected]>, <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > > > NO > > > > > > Date: Tue, 18 Aug 2009 19:08:53 +0530 > From: [email protected] > To: [email protected] > Subject: [OSL | CCIE_RS] BGP listens on TCP port 179 > > > > > > > R0-----R1 > > R0#sh run | s bgp > router bgp 1 > no synchronization > bgp log-neighbor-changes > neighbor 10.10.10.2 remote-as 2 > no auto-summary > R0# > > R1#sh run | s bgp > router bgp 2 > no synchronization > bgp log-neighbor-changes > neighbor 10.10.10.1 remote-as 1 > no auto-summary > R1# > > R0#show tcp | in port > Local host: 10.10.10.1, Local port: 179 > Foreign host: 10.10.10.2, Foreign port: 23818 > > R1#show tcp | i port > Local host: 10.10.10.2, Local port: 23818 > Foreign host: 10.10.10.1, Foreign port: 179 > > BGP listens on TCP port 179 , according to above output I see only router > R0 is listening on port 179.. but R1 is on 2318. Shouldn't be we have > separate TCP connection on R1 with listening port 179 ? > > > Sincerely, > Taqdir Singh > 91-9911709496 > Do today what others won't So you can live tomorrow what others can't > > > > See the Web's breaking stories, chosen by people like you. Check out Yahoo! > Buzz.No > _________________________________________________________________ > Windows Live: Keep your friends up to date with what you do online. > > http://windowslive.com/Campaign/SocialNetworking?ocid=PID23285::T:WLMTAGL:ON:WL:en-US:SI_SB_online:082009 > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090818/02f662e6/attachment-0001.htm > > ------------------------------ > > Message: 2 > Date: Tue, 18 Aug 2009 19:20:16 +0530 (IST) > From: Taqdir Singh <[email protected]> > Subject: [OSL | CCIE_RS] RIP and BGP are application layer protocol > To: [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > Can any1 please clear , how RIP and BGP are application layer protocols ? > Why BGP?is so made to carry the E-BGP next-hop in?internal AS ? > ?Sincerely, > Taqdir Singh > 91-9911709496 > Do today what others won't So you can live tomorrow what others can't > > > Looking for local information? Find it on Yahoo! Local > http://in.local.yahoo.com/ > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090818/29e39f28/attachment-0001.htm > > ------------------------------ > > Message: 3 > Date: Tue, 18 Aug 2009 16:00:54 +0200 > From: Rick Mur <[email protected]> > Subject: Re: [OSL | CCIE_RS] Frame Relay MultiLink Problem > To: Tahir Bashir <[email protected]> > Cc: CCIE RS_FORUM <[email protected]> > Message-ID: > <[email protected]> > Content-Type: text/plain; charset="windows-1252" > > Multilink Frame Relay means bundling frame-relay interfaces. You should > connect the serial interfaces to the FR switch as you normally would, but > the switch should support it. I don't know if Dynamips supports this, but > you can try the configuration using 2 or more back-to-back serial links. > Example: > ! > interface Serial0/1 > encapsulation frame-relay mfr 1 > no shutdown > ! > interface Serial0/2 > encapsulation frame-relay mfr 1 > no shutdown > ! > interface mfr1 > no keep-alive > no ip address > ! > interface mfr1.1 point-to-point > ip address 10.0.0.1 255.255.255.0 > frame-relay interface-dlci 101 > ! > > -- > Regards, > > Rick Mur > CCIE2 #21946 (R&S / Service Provider) > Juniper JNCIA-ER & JNCIA-EX > MCSA:Messaging, MCSE > Sr. Support Engineer ? IPexpert, Inc. > URL: http://www.IPexpert.com <http://www.ipexpert.com/> > > > On Tue, Aug 18, 2009 at 2:58 PM, Tahir Bashir <[email protected] > >wrote: > > > Hi All, > > > > I am getting some problems in Multilink Frame Relay design on GNS3. My > MFR > > links are down. I would like to know the way how to connect the Multilink > > with FR Switch and mapping entries in FR Switch. > > > > > > > > > > > > Regards, > > > > Tahir Bashir > > > > > > ------------------------------ > > check out the rest of the Windows Live?. More than mail?Windows Live? > goes > > way beyond your inbox. More than messages< > http://www.microsoft.com/windows/windowslive/> > > > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > > visit www.ipexpert.com > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090818/f845e3eb/attachment-0001.htm > > ------------------------------ > > Message: 4 > Date: Tue, 18 Aug 2009 20:03:33 +0600 > From: Tahir Bashir <[email protected]> > Subject: Re: [OSL | CCIE_RS] Frame Relay MultiLink Problem > To: <[email protected]> > Cc: CCIE RS_FORUM <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="windows-1252" > > > > Hi Rick, > > > > I have following configuration on my HUB Router for Multilink FR. But I m > getting mfr interface down and serial interfaces are also down. > > > > interface MFR1 > ip address 100.100.100.2 255.255.255.0 > frame-relay map ip 100.100.100.2 204 > frame-relay map ip 100.100.100.4 204 broadcast > frame-relay map ip 100.100.100.5 205 broadcast > frame-relay map ip 100.100.100.6 206 broadcast > no frame-relay inverse-arp > ! > interface Serial1/0 > no ip address > encapsulation frame-relay MFR1 > serial restart-delay 0 > no arp frame-relay > ! > interface Serial1/1 > no ip address > encapsulation frame-relay MFR1 > serial restart-delay 0 > no arp frame-relay > > > > > > > > > > Regards, > > Tahir Bashir > > > > > > > Date: Tue, 18 Aug 2009 16:00:54 +0200 > Subject: Re: [OSL | CCIE_RS] Frame Relay MultiLink Problem > From: [email protected] > To: [email protected] > CC: [email protected] > > Multilink Frame Relay means bundling frame-relay interfaces. You should > connect the serial interfaces to the FR switch as you normally would, but > the switch should support it. I don't know if Dynamips supports this, but > you can try the configuration using 2 or more back-to-back serial links. > > > Example: > ! > interface Serial0/1 > encapsulation frame-relay mfr 1 > no shutdown > ! > interface Serial0/2 > encapsulation frame-relay mfr 1 > no shutdown > ! > interface mfr1 > no keep-alive > no ip address > ! > interface mfr1.1 point-to-point > ip address 10.0.0.1 255.255.255.0 > frame-relay interface-dlci 101 > ! > > -- > Regards, > > Rick Mur > CCIE2 #21946 (R&S / Service Provider) > Juniper JNCIA-ER & JNCIA-EX > MCSA:Messaging, MCSE > Sr. Support Engineer ? IPexpert, Inc. > URL: http://www.IPexpert.com <http://www.ipexpert.com/> > > > > > On Tue, Aug 18, 2009 at 2:58 PM, Tahir Bashir <[email protected]> > wrote: > > > > Hi All, > I am getting some problems in Multilink Frame Relay design on GNS3. My MFR > links are down. I would like to know the way how to connect the Multilink > with FR Switch and mapping entries in FR Switch. > > > Regards, > Tahir Bashir > > > > > check out the rest of the Windows Live?. More than mail?Windows Live? goes > way beyond your inbox. More than messages > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > > > > > _________________________________________________________________ > Show them the way! Add maps and directions to your party invites. > http://www.microsoft.com/windows/windowslive/products/events.aspx > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090818/9beff49e/attachment-0001.htm > > ------------------------------ > > Message: 5 > Date: Tue, 18 Aug 2009 10:01:20 -0400 > From: prakash patel <[email protected]> > Subject: Re: [OSL | CCIE_RS] RIP and BGP are application layer > protocol > To: <[email protected]>, <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > > RIP is the oldest one where some hosts can learn RIP routes from router. ON > host, RIP has to run as application ..am I right? > > > > BGP can change by doing "next-hop-self" so you have that option. > > > > > > > > Date: Tue, 18 Aug 2009 19:20:16 +0530 > From: [email protected] > To: [email protected] > Subject: [OSL | CCIE_RS] RIP and BGP are application layer protocol > > > > > > > Can any1 please clear , how RIP and BGP are application layer protocols ? > Why BGP is so made to carry the E-BGP next-hop in internal AS ? > Sincerely, > Taqdir Singh > 91-9911709496 > Do today what others won't So you can live tomorrow what others can't > > > > Love Cricket? Check out live scores, photos, video highlights and more. > Click here. > _________________________________________________________________ > Get back to school stuff for them and cashback for you. > > http://www.bing.com/cashback?form=MSHYCB&publ=WLHMTAG&crea=TEXT_MSHYCB_BackToSchool_Cashback_BTSCashback_1x1 > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090818/436318a1/attachment-0001.htm > > ------------------------------ > > Message: 6 > Date: Tue, 18 Aug 2009 19:44:54 +0530 (IST) > From: Taqdir Singh <[email protected]> > Subject: Re: [OSL | CCIE_RS] RIP and BGP are application layer > protocol > To: prakash patel <[email protected]>, > [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > Hi Prakash > > I know?we can use next hop self . but that is not answer to my question.. > > my question....is why BGP?is so made to carry next hop of ebgp in internal > AS ?? > > AS100(C)----e-bgp---AS200(A)----ibgp----AS200(B) > > Why?BGP was not made so?that router A automatically advertise routes to B > with next hop of itself.. as in case of all the other routing protocols ? > > and Why BGP is application layer ? > ?Sincerely, > Taqdir Singh > 91-9911709496 > Do today what others won't So you can live tomorrow what others can't > > > > > ________________________________ > From: prakash patel <[email protected]> > To: [email protected]; [email protected] > Sent: Tuesday, 18 August, 2009 7:31:20 PM > Subject: RE: [OSL | CCIE_RS] RIP and BGP are application layer protocol > > RIP is the oldest one where some hosts can learn RIP?routes from router. ON > host, RIP has to run as application ..am I right? > ? > BGP?can?change by doing "next-hop-self" so?you have that option. > ? > > ? > ________________________________ > Date: Tue, 18 Aug 2009 19:20:16 +0530 > From: [email protected] > To: [email protected] > Subject: [OSL | CCIE_RS] RIP and BGP are application layer protocol > > > Can any1 please clear , how RIP and BGP are application layer protocols ? > Why BGP?is so made to carry the E-BGP next-hop in?internal AS ? > ?Sincerely, > Taqdir Singh > 91-9911709496 > Do today what others won't So you can live tomorrow what others can't > ________________________________ > Love Cricket? Check out live scores, photos, video highlights and more. > Click here. > ________________________________ > Get back to school stuff for them and cashback for you. Try BingT now. > > > See the Web's breaking stories, chosen by people like you. Check > out Yahoo! Buzz. http://in.buzz.yahoo.com/ > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090818/0b0caee7/attachment.htm > > End of CCIE_RS Digest, Vol 43, Issue 92 > *************************************** > -- Narbik Kocharians CCSI#30832, CCIE# 12410 (R&S, SP, Security) www.MicronicsTraining.com Sr. Technical Instructor
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