At 10:04 PM 1/14/02, Kane, Christopher A. wrote: >Yes, OSPF sends hellos on Serial interfaces. In point-to-point networks >OSPF's hello is multicast. There is no DR/BDR so it's my understanding that >it simply becomes a Master/Slave relationship.
During the database description exchange state, the routers are in a master/slave relation. For the rest of the time, the adjacent neighbors are just friendly peers, wouldn't you say? >Mindful that in OSPF a Neighbor is not the same as an Adjacency. All routers >become neighbors (assuming all aspects of the Hello protocol are agreed >upon) They only become Adjacent with the respective DR and BDR of the >network in the case of a network on a broadcast medium. We're talking about non-broadcast WAN networks...... >I'm pretty sure you >only see "2-way" as a neighbor state on point-to-point links rather than I should try it, but I thought 2-way was an intermediate state, regardless of the type of network. >seeing "Full" as on a broadcast medium. > >I'd need someone else to chime in on point-to-multipoint as I haven't >configured that lately. > >Chris > >-----Original Message----- >From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] >Sent: Monday, January 14, 2002 8:40 PM >To: [EMAIL PROTECTED] >Subject: Re: Encapsulation Failed [7:31916] > > >At 07:57 PM 1/14/02, s vermill wrote: > >Priscilla, > > > >May I ask what led you to believe that bridging was involved as opposed to > >just assuming that the source address was the Cisco router itself? > >Good question. The IBM 6611 does bridging for one thing. The other hint was >that it was attempting to send an OSPF Hello on a serial interface. Does >OSPF do that? How does it establish adjacency to a neighbor router on a >WAN? On a point-to-point network, I figured it just knew who its neighbor >was. > >On a non-broadcast, multiple-access network, such as Frame Relay, you >normally configured the neighbor command. > >I've only seen the OSPF multicast Hellos on LANs, (but I can't afford a WAN >Sniffer anymore! ;-) > >Gurus? Help? Thanks. > >Priscilla > >P.S. Anyone seeing this may be confused because you didn't include the >original message. PLEASE, people, reply with the body of the message in the >reply. We work in connectionless, stateless mode. How do you expect anyone >to easily connect this to the discussion about a router failing to forward >a packet on a PPP link to an IBM 6611. Hello????? > > > >Just as an opportunity to learn something. > > > >Regards, > > > >Scott >________________________ > >Priscilla Oppenheimer >http://www.priscilla.com ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=31949&t=31916 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
