Friday Follies #2 [7:73371]
[This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73371t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com
Re: Friday Follies #2 [7:73371]
At 7:00 PM + 8/1/03, John Neiberger wrote: [This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? Oh. Addresses from THAT planet. :-) Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73380t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Re: Friday Follies #2 [7:73371]
Three words MY-CROW-SOFF? John Neiberger wrote in message news:[EMAIL PROTECTED] [This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73378t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Re: Friday Follies #2 [7:73371]
Bill Gates leaving his mark on your network?? Jason [This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73375t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com
Re: Friday Follies #2 [7:73371]
Possibly, but you have to give more detail to win the prize. :-) [Notice: there is no prize associated with this question. ] Jason Viera 8/1/03 2:22:32 PM Bill Gates leaving his mark on your network?? Jason [This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73379t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
RE: Friday Follies #2 [7:73371]
Yes! Daniel mentions the RFC and Kevin Wigle mentioned APIPA, or Automatic Private IP Addressing. You can find out more about that at: http://www.webopedia.com/TERM/A/APIPA.html This means that Daniel and Kevin get to share the extra credit prize! Thanks to all who participated, John Daniel Cotts 8/1/03 3:16:24 PM pad pad pad ftp://ftp.rfc-editor.org/in-notes/rfc3330.txt -Original Message- From: John Neiberger [mailto:[EMAIL PROTECTED] Sent: Friday, August 01, 2003 2:00 PM To: [EMAIL PROTECTED] Subject: Friday Follies #2 [7:73371] [This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73388t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
RE: Friday Follies #2 [7:73371]
pad pad pad ftp://ftp.rfc-editor.org/in-notes/rfc3330.txt -Original Message- From: John Neiberger [mailto:[EMAIL PROTECTED] Sent: Friday, August 01, 2003 2:00 PM To: [EMAIL PROTECTED] Subject: Friday Follies #2 [7:73371] [This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73383t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Re: Friday Follies #2 [7:73371]
APIPA leaving for someone else to take further. - Original Message - From: John Neiberger To: Sent: Friday, August 01, 2003 3:00 PM Subject: Friday Follies #2 [7:73371] [This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com ~~ allowattachmentsout Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73387t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Re: Friday Follies #2 [7:73371]
Actually, Apple used that block as well for local networking. quote: If the host has a Microsoft Windows OS (9x or 2000/XP) or an Apple OS, it will fall back to what is called the auto-configure address, which is an address from the 169.254/16 address space (this was in accordance with the draft-ietf-dhc-ipv4-autoconfig-04.txt, which expired in October, 1999). The host will check on the network segment for a conflict with another host using the same address, up to 10 addresses. The client will then check in the background for a DHCP server every 5 minutes, abandoning the auto-configured address as soon as it can obtain one from the server. I have no information at this time on the behavior of various Linux clients. end quote from my DNS-DHCP tutorial Annlee Charles Cthulu Riley wrote: Three words MY-CROW-SOFF? John Neiberger wrote in message news:[EMAIL PROTECTED] [This isn't the usual type of follies question where you have to figure something out. In this case, you either know the answer or you don't. If you don't, you can probably figure out how to look it up and it would be good information to have in case you see this in your own network.] Your network uses RFC 1918 private IP address space (10.0.0.0/8) for your addressing. You have a logging access list configured on a LAN interface and you begin seeing traffic from devices in the 169.254.0.0/16 subnet destined for 169.254.255.255. You don't have any machines configured with addresses in this subnet, so what could it be? **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73386t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Re: Friday Follies #2 [7:73371]
At 9:04 PM + 8/1/03, annlee wrote: Actually, Apple used that block as well for local networking. quote: If the host has a Microsoft Windows OS (9x or 2000/XP) or an Apple OS, it will fall back to what is called the auto-configure address, which is an address from the 169.254/16 address space (this was in accordance with the draft-ietf-dhc-ipv4-autoconfig-04.txt, which expired in October, 1999). The range finally made it into a DHCP RFC and is IANA reserved. The host will check on the network segment for a conflict with another host using the same address, up to 10 addresses. The client will then check in the background for a DHCP server every 5 minutes, abandoning the auto-configured address as soon as it can obtain one from the server. I have no information at this time on the behavior of various Linux clients. end quote from my DNS-DHCP tutorial Annlee Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73390t=73371 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
