RE: TFTP over anycast

[Adam Thompson <athompson () merlin mb ca>]

Others have addressed some of the issues, but one easy win for DHCP (which is otherwise a PITA to make redundany in 
*any* way) is to (a) not block ICMP anywhere, including on the client devices, and (b) have the DHCP ping before 
assignment.  That’s not always on by default, and it’ll eliminate ~90% of the conflicts you would otherwise encounter 
if the anycast node isn’t extremely stable.  If you become aware of a distributed DHCP server that actually works well 
in this environment, that’s worth a post to the list all by itself.
-Adam

Adam Thompson
Consultant, Infrastructure Services
[cid:image001.png@01DA663E.AD5957D0]
100 - 135 Innovation Drive
Winnipeg, MB R3T 6A8
(204) 977-6824 or 1-800-430-6404 (MB only)
https://www.merlin.mb.ca<https://www.merlin.mb.ca/>
[cid:image002.png@01DA663E.AD5957D0]Chat with me on Teams<https://teams.microsoft.com/l/chat/0/0?users=athompson () 
merlin mb ca>
[https://res-h3.public.cdn.office.net/assets/bookwithme/misc/CalendarPerson20px.png]<https://outlook.office.com/bookwithme/user/a3e87142ccc14503bf5ec7ea59afd6e3
 () merlin mb ca?anonymous&ep=bwmEmailSignature>
Book time to meet with me<https://outlook.office.com/bookwithme/user/a3e87142ccc14503bf5ec7ea59afd6e3 () merlin mb 
ca?anonymous&ep=bwmEmailSignature>


From: NANOG <nanog-bounces+athompson=merlin.mb.ca () nanog org> On Behalf Of Javier Gutierrez
Sent: Thursday, February 22, 2024 12:47 PM
To: nanog () nanog org
Subject: TFTP over anycast

Hi,
I'm working on some DR design and we want to not only have this site as a DR but also performing some active/active for 
some of the services we hosts and I was wondering if someone had some experience with using anycast for TFTP or DHCP 
services?
What are some of the pains/challenges you experienced and things we should lookout for?

Any input is greatly appreciated.


Kind regards,



Javier Gutierrez