nanog mailing list archives
Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup
From: Blake Hudson <blake () ispn net>
Date: Fri, 26 Mar 2021 14:13:59 -0500
On 3/26/2021 2:01 PM, William Herrin wrote:
And here I almost went as far as to suggest unnumbered IPs.... you're plan is... well... diabolical in comparison.If you feel like getting fancy... Use /32 routes to reclaim the unused base and broadcast address in any /30s Pick the next largest size block that has your /24 neither at the start or end and assign that to your lan. Use proxy arp and more specific routes to grab traffic that doesn't fall in the /24 or is part of the loopback and point to point numbering and move it off the lan and towards its destination (including upstream). .. You have 10.0.1.0/24 Put 10.0.0.0/22 on your LAN Add proxy arp and route 10.0.0.0/24 upstream Add proxy arp and route 10.0.2.0/23 upstream Add proxy arp and route 10.0.1.254/32 to your first router loopback etc. If you're really clever you can convince the stations that 10.0.0.1 is the default gateway but convince the router that 10.0.0.1 is upstream so that the router doesn't even need a dedicated IP address facing the LAN. Regards, Bill Herrin
Current thread:
- Best practice for ptp/loopback numbering for "small" enterprise multihome setup vom513 (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Randy Bush (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Tom Beecher (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Blake Hudson (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup William Herrin (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Blake Hudson (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup William Herrin (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Lukas Tribus (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Blake Hudson (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Blake Hudson (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Randy Bush (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Lukas Tribus (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup William Herrin (Mar 26)
- Re: Best practice for ptp/loopback numbering for "small" enterprise multihome setup Lukas Tribus (Mar 26)