nanog mailing list archives
Re: Partial vs Full tables
From: William Herrin <bill () herrin us>
Date: Wed, 10 Jun 2020 16:18:03 -0700
On Wed, Jun 10, 2020 at 3:02 PM Baldur Norddahl <baldur.norddahl () gmail com> wrote:
Am I correct in assuming loose mode RPF only drops packets from unannounced address space in the global routing table?
Actually, I'm not sure since my plan around RPF is "10 foot pole." Is "loose mode" really just filtering packets the current routing table deems to be bogons? If it's not tied in any way to the actual routing paths then it seems poorly named.
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.
Those "other" ICMP messages are kinda important since TCP fails if they're discarded. If it's just a bogon filter then by definition only simplex communications can be impacted since there's known to be no way for duplex communication to occur. PMTUD and traceroute responses are examples: a router telling a host information but expecting no response. SNMP traps are simplex though it's not obvious to me how that would matter here. What else can you think of that's simplex? Regards, Bill Herrin -- William Herrin bill () herrin us https://bill.herrin.us/
Current thread:
- Re: Partial vs Full tables, (continued)
- Re: Partial vs Full tables Ryan Rawdon (Jun 05)
- Re: Partial vs Full tables Baldur Norddahl (Jun 05)
- 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 Ryan Rawdon (Jun 05)
- Re: Partial vs Full tables Brian Johnson (Jun 11)
- Re: Partial vs Full tables Brian Johnson (Jun 11)