nanog mailing list archives
Re: Partial vs Full tables
From: Robert Blayzor <rblayzor.bulk () inoc net>
Date: Thu, 11 Jun 2020 11:36:23 -0400
On 6/10/20 6:01 PM, Baldur Norddahl wrote:
Am I correct in assuming loose mode RPF only drops packets from unannounced address space in the global routing table? And the downside of doing so is that sometimes we do receive packets from that address space, usually back scatter from traceroute or other ICMP messages. Currently about 25% of the routable address space is not advertised in the DFZ. Loose mode RPF could filter this. Is there any data on how much traffic actually arrives from this space?
Loose mode RPF will essentially drop traffic received on the interface if the router does not have any route for. (will not match a default or a discard route, at least in IOS-XR) As Bill has pointed out, this may drop traffic from some peering networks that are not in the global routing table. Though one could argue that if a packet needs to be fragged it's typically closer to the edges rather than the transit/peering links. -- inoc.net!rblayzor XMPP: rblayzor.AT.inoc.net PGP: https://pgp.inoc.net/rblayzor/
Current thread:
- Re: Partial vs Full tables, (continued)
- Re: Partial vs Full tables Ryan Rawdon (Jun 06)
- Re: Partial vs Full tables Alejandro Acosta (Jun 09)
- Re: Partial vs Full tables Robert Blayzor (Jun 10)
- Re: Partial vs Full tables William Herrin (Jun 10)
- Re: Partial vs Full tables William Herrin (Jun 10)
- Re: Partial vs Full tables Brian Johnson (Jun 10)
- Re: Partial vs Full tables William Herrin (Jun 10)
- Re: Partial vs Full tables Baldur Norddahl (Jun 10)
- Re: Partial vs Full tables William Herrin (Jun 10)
- Re: Partial vs Full tables Chris Adams (Jun 10)
- Re: Partial vs Full tables Robert Blayzor (Jun 11)
- RE: Partial vs Full tables Brian Turnbow via NANOG (Jun 12)
- Re: Partial vs Full tables William Herrin (Jun 10)
- Re: Partial vs Full tables brad dreisbach (Jun 11)
- Re: Partial vs Full tables William Herrin (Jun 11)
- RE: Partial vs Full tables Drew Weaver (Jun 15)
- Re: Partial vs Full tables Saku Ytti (Jun 15)
- RE: Partial vs Full tables Drew Weaver (Jun 15)
- Re: Partial vs Full tables Brian Johnson (Jun 11)
- Re: Partial vs Full tables Brian Johnson (Jun 11)
- Re: Partial vs Full tables William Herrin (Jun 11)
- Re: Partial vs Full tables Brian Johnson (Jun 11)