I'm impressed. Wouldn't it be cool if that skill were required for CCIE? ;-) It's certainly more useful than being able to hand decode Token Ring RIFs?
Priscilla At 07:02 AM 2/1/02, Phil Barker wrote: >Version 4: >HLEN = 5: Normal IP Header (5 losts of 32 bits) >Service Type 0: Normal. >Total Length = 328 bytes. Thus data length = 308 >bytes. >Identification = 51514. Flags & Offset = 0. >TTL = 255. >Protocol 17: UDP. >Header checksum 0xf16a. >Source IP : 0.0.0.0 >Dest IP : 255.255.255.255 b/cast >Src Port 68: bootp client >Dest Port 67: bootp server >Message Length = 308 (length - IP header) >No Checksum: > > >4500 0148 c93a 0000 ff11 f16a 0000 0000 >ffff ffff 0044 0043 0134 0000 0101 0600 >0000 0000 a3c6 0000 0000 0000 0000 0000 >0000 0000 0000 0000 0010 0b3c 3580 0000 >0000 0000 0000 0000 0000 0000 0000 0000 >0000 > >Bootp client to server. > >Looks like because it has no source address 0.0.0.0, >it is trying to find it via a bootp server. I think >this operates like RARP except it is routable !!! > >Not totally sure though. > >Regards, > >Phil. > > --- Tay Chee Yong wrote: > Hi >all, > > > > Just like to enquire some issue regarding Catalyst > > 2924 > > > > I have a pretty old Catalyst 2924 (C2900XL-H-M) > > switch in my office running > > IOS Version 11.2(8)SA3, however, it seems that the > > switch is constantly > > sending out broadcast messages as captured by > > tcpdump. > > > > 17:14:51.053952 0:10:b:3c:35:80 Broadcast ip 342: > > 0.0.0.0.bootpc > > > 255.255.255.255.bootps: secs:41926 [|bootp] > > 4500 0148 c93a 0000 ff11 f16a 0000 0000 > > ffff ffff 0044 0043 0134 0000 0101 0600 > > 0000 0000 a3c6 0000 0000 0000 0000 0000 > > 0000 0000 0000 0000 0010 0b3c 3580 0000 > > 0000 0000 0000 0000 0000 0000 0000 0000 > > 0000 > > > > I did not configure any IP address on Vlan 1 on the > > switch, but I did > > segment the switch to contain 2 more vlans (Vlan 2, > > 3) However, I also have > > some machines residing on Vlan 1. > > > > However, the broadcast problem disappear after I > > move out the vlan1 > > machines into another newly created Vlan (vlan 4), > > after I had shutdown > > Interface Vlan 1. > > > > Can anyone care to enlighten me? Thanks. > > > > Regards, > > Cheeyong >[EMAIL PROTECTED] > >__________________________________________________ >Do You Yahoo!? >Everything you'll ever need on one web page >from News and Sport to Email and Music Charts >http://uk.my.yahoo.com ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=34092&t=34024 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
