From: Ed Lui (edwlui@gmail.com)
Date: Tue Mar 22 2005 - 19:07:12 GMT-3
================================================================
<From cisco.com>
When the router first starts up, it sends only hello packets to those
routers with non-zero priority; that is, routers that are eligible to
become designated routers (DR) and backup designated routers (BDR).
After DR and BDR are selected, DR and BDR will then start sending
hello packets to all neighbors in order to form adjacencies.
================================================================
Thank you, Brian !
-- Edward A+.Net+.MCP.MCP+I.MCSE.CCNA.CCNPOn Tue, 22 Mar 2005 16:56:27 -0500, Brian Dennis <bdennis@internetworkexpert.com> wrote: > Are you sure that it will not send OSPF hellos when the "ip ospf > priority 0" command is applied? > > Router#deb ip ospf events > Router#sho run int s0/0 > Building configuration... > > Current configuration : 134 bytes > ! > interface Serial0/0 > ip address 1.1.1.1 255.255.255.0 > encapsulation frame-relay > ip ospf priority 0 > end > > Router# > *Mar 1 00:04:42.511: OSPF: Send hello to 0.0.0.6 area 0 on Serial0/0 > from 1.1.1.1 > > Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security) > > bdennis@internetworkexpert.com > Internetwork Expert, Inc. > http://www.InternetworkExpert.com > Toll Free: 877-224-8987 > Direct: 775-745-6404 (Outside the US and Canada) > > -----Original Message----- > From: Jongsoo.Kim@Intelsat.com [mailto:Jongsoo.Kim@Intelsat.com] > Sent: Tuesday, March 22, 2005 1:15 PM > To: mwhite23@gmail.com > Cc: ccielab@groupstudy.com; Brian Dennis > Subject: RE: OSPF NETWORK TYPE > > Matt > > I think "ip ospf priority 0" under interface make router not send Hello > unless it received. > On another way to explain this, it will not initiate sending hello. > Perhaps this is reason that neighbor command won't be allowed because > neighbor command will try to make router initiate sending hello0... > > Jongsoo > > -----Original Message----- > From: Brian Dennis [mailto:bdennis@internetworkexpert.com] > Sent: Tuesday, 22 March, 2005 4:07 PM > To: Matt White > Cc: ccielab@groupstudy.com > Subject: RE: OSPF NETWORK TYPE > > The IOS will not allow you to put both commands in. > > Router#wr t > <snip> > ! > interface Serial0/0 > ip address 1.1.1.1 255.255.255.0 > encapsulation frame-relay > ip ospf priority 0 > ! > router ospf 1 > router-id 1.1.1.1 > log-adjacency-changes > network 0.0.0.0 255.255.255.255 area 0 > ! > <snip> > Router#conf t > Enter configuration commands, one per line. End with CNTL/Z. > Router(config)#router ospf 1 > Router(config-router)#neighbor 1.1.1.2 > Router(config-router)#do term len 5 > Router(config-router)#do sho run | be router ospf > router ospf 1 > router-id 1.1.1.1 > log-adjacency-changes > network 0.0.0.0 255.255.255.255 area 0 > ! > Router(config-router)#int s0/0 > Router(config-if)#no ip os pri 0 > Router(config)#router ospf 1 > Router(config-router)#neighbor 1.1.1.2 > Router(config-router)#do sho run | be router ospf > router ospf 1 > router-id 1.1.1.1 > log-adjacency-changes > network 0.0.0.0 255.255.255.255 area 0 > neighbor 1.1.1.2 > > Let me ask you this, in what situation would you need both commands > applied? > > Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security) > bdennis@internetworkexpert.com > > Internetwork Expert, Inc. > http://www.InternetworkExpert.com > Toll Free: 877-224-8987 > Direct: 775-745-6404 (Outside the US and Canada) > > -----Original Message----- > From: Matt White [mailto:mwhite23@gmail.com] > Sent: Tuesday, March 22, 2005 12:54 PM > To: Brian Dennis > Cc: Kunle Ayodele; ccielab@groupstudy.com; generalccie@yahoo.com > Subject: Re: OSPF NETWORK TYPE > > Brian, in regard to the following, why not? > > "you can not put the OSPF 'neighbor' > command on the spokes if they also have the "ip ospf priority" command > applied to the interface." > > On Tue, 22 Mar 2005 01:55:42 -0500, Brian Dennis > <bdennis@internetworkexpert.com> wrote: > > You do not need the OSPF "neighbor" command on the spokes. It is only > > need on the hub. As a side note, you can not put the OSPF "neighbor" > > command on the spokes if they also have the "ip ospf priority" command > > applied to the interface. > > > > Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security) > > bdennis@internetworkexpert.com > > > > Internetwork Expert, Inc. > > http://www.InternetworkExpert.com > > Toll Free: 877-224-8987 > > Direct: 775-745-6404 (Outside the US and Canada) > > > > -----Original Message----- > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf > Of > > Kunle Ayodele > > Sent: Monday, March 21, 2005 10:35 PM > > To: ccielab@groupstudy.com > > Cc: generalccie@yahoo.com > > Subject: OSPF NETWORK TYPE > > > > Hi Micheal, > > Looking thru ur configs,for a NON-BROADCAST OSPF > > network type, who would also need a neigbour command > > on the spoke..U could also remove the ip > > split-horizon(though not needed cos ospf is a link > > protocol- but it sure keeps ur config clean and easy > > to troobleshoot.. > > Regards > > Kunle > > --- Michael Wong <generalccie@yahoo.com> wrote: > > > Hi, > > > > > > I have a hub-spoke frame relay cloud, the hub (R6) > > > is multipoint subinterface, spokes (R7, R8) are > > > physical interface. The OSPF network type is > > > Non-broadcast. I have put neigh statements on hub > > > router R6, and put ip ospf priority 0 on each spoke > > > router frame interface. But R6 still can not form > > > neighbor relationship with R8. Am I missing some > > > config here? > > > > > > R6#wr t > > > interface Serial0 > > > no ip address > > > encapsulation frame-relay > > > > > > interface Serial0.3 multipoint > > > ip address 167.78.86.1 255.255.255.248 > > > frame-relay map ip 167.78.86.2 608 broadcast > > > frame-relay map ip 167.78.86.3 607 broadcast > > > > > > router ospf 1 > > > router-id 6.6.6.6 > > > log-adjacency-changes > > > network 142.52.0.0 0.0.0.255 area 1 > > > network 167.78.86.0 0.0.0.7 area 0 > > > neighbor 167.78.86.3 > > > neighbor 167.78.86.2 > > > > > > R6#sho ip ospf ne > > > Neighbor ID Pri State Dead Time > > > Address Interface > > > 7.7.7.7 0 FULL/DROTHER 00:01:41 > > > 167.78.86.3 Serial0.3 > > > N/A 0 ATTEMPT/DROTHER - > > > 167.78.86.2 Serial0.3 > > > > > > R8#wr t > > > interface Serial0/0 > > > ip address 167.78.86.2 255.255.255.248 > > > encapsulation frame-relay > > > ip split-horizon > > > ip ospf priority 0 > > > frame-relay map ip 167.78.86.1 806 broadcast > > > frame-relay map ip 167.78.86.3 806 broadcast > > > > > > router ospf 1 > > > router-id 8.8.8.8 > > > log-adjacency-changes > > > network 167.78.86.0 0.0.0.7 area 0 > > > > > > R8#sho ip ospf ne > > > Neighbor ID Pri State Dead Time > > > Address Interface > > > 6.6.6.6 1 INIT/DROTHER 00:01:04 > > > 167.78.86.1 Serial0/0 > > > > > > R7#wr t > > > interface Serial0/0 > > > ip address 167.78.86.3 255.255.255.248 > > > encapsulation frame-relay > > > ip split-horizon > > > ip ospf priority 0 > > > frame-relay map ip 167.78.86.1 706 broadcast > > > frame-relay map ip 167.78.86.2 706 broadcast > > > ! > > > router ospf 1 > > > router-id 7.7.7.7 > > > log-adjacency-changes > > > network 167.78.86.0 0.0.0.7 area 0 > > > > > > R7#sho ip osp ne > > > Neighbor ID Pri State Dead Time > > > Address Interface > > > 6.6.6.6 1 FULL/DR 00:01:34 > > > 167.78.86.1 Serial0/0 > > > > > > > > > > > > --------------------------------- > > > Do you Yahoo!? > > > Yahoo! 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