[Babel-users] 57 forks of babel on github

[Dave Taht]

resending this because spamhaus doesn't like my ipv6 address.
On Sun, Oct 28, 2018 at 12:06 PM Dave Taht <dave at taht.net> wrote:
>
> Toke Høiland-Jørgensen <toke at toke.dk> writes:
>
> > Dave Taht <dave.taht at gmail.com> writes:
> >
> >> I haven't figured out enough of bird to get it to stop announcing all
> >> the local ips, btw, and am quite
> >
> > That part it doesn't actually do by default; I added it to the sample
> > config to match babeld.
> >
> > Just get rid of the "protocol direct" section and they should go away...
>
> Cool. I got rid of that. Now the local ip stays routable (covered by
> a kernel route) and less bad stuff is happening. Hmm... yes, in general
> it is a bad idea to export your local ip. just rely on the /24
> kernel route for an ethernet subnet....
>
> Any idea why I get this back?
>
> Couldn't parse packet (8, 12) from fe80::230:18ff:fec9:de9c on enp7s0.
> Received prefix with no router id.
> Couldn't parse packet (8, 11) from fe80::230:18ff:fec9:de9c on enp7s0.
> Received prefix with no router id.
>
> ...
>
> I'm sitting here watching 12,000 routes injected from this box
> not kill anything...
>
> d at ceres:~$ cat /etc/babeld.conf
> default enable-timestamps true
> interface enp7s0
> interface enp6s0
> interface enp4s0
> redistribute proto 50 allow
> redistribute local deny
> redistribute deny
>
>
> but a whole bunch of routes on lesser boxes went unreachable or were
> lost at 20k. For giggles, I injected 20k routes at the ceres (nlogn box)
> and 40k routes at the bird (prancer) box.
>
>
> d at ceres:~/git/babeld-fixes$ ip -6 route | wc -l
> 60099
>
> root at rudolf:~/git/babeld-taht# ip -6 route | wc -l # apu2 100mbit
> 27559
>
> root at gw1:~# ip -6 route | wc -l # openwrt arm, gigE theoreticall
> 9434
>
> This is just me being a bull in the china shop. It is generally my
> intepretation of the results that I'm not seeing bugs in the protocol,
> or implementation, as forcing stuff into overload like this, seemed to
> me to be mostly related to first seeing late hellos and the metric
> going to infinity, from looking at nc ::1 33123. But I can certainly
> look harder... after I settle on one set of source code to be running,
> take some packet captures, do some port mirroring, etc.
>
> root at rudolf:~/git/babeld-taht# ip route
> 172.22.0.0/24 dev enp3s0  proto kernel  scope link  src 172.22.0.193
> unreachable 172.22.148.0/22  proto babel
> unreachable 172.22.192.0/22  proto 44
> 172.22.193.0/24 dev enp2s0  proto kernel  scope link  src 172.22.193.1 linkdown
> unreachable 172.22.220.0/22  proto babel
> unreachable 192.168.122.1  proto babel
>
> This box is also rate limited to 20mbits presently and is not
> dropping or marking all that many packets, so that doesn't really
> explain why it only had 9k routes when the others got more.
>
> I tend to use sqm to outbound/inbound rate limit with fq_codel to
> 1mbit for a 2ghz wifi semi-emulation, and 6mbit for 5ghz. This
> approach will break down entirely once we see unicast stuff... and I'll
> have to go back to wifi....
>
>
>
> root at rudolf:~/git/babeld-taht# tc -s qdisc show dev ifb4enp3s0
> qdisc htb 1: root refcnt 2 r2q 10 default 10 direct_packets_stat 0 direct_qlen 32
>  Sent 1046332742 bytes 987960 pkt (dropped 4062, overlimits 1070697 requeues 0)
>  backlog 0b 0p requeues 0
> qdisc fq_codel 110: parent 1:10 limit 1001p flows 1024 quantum 1514 target 5.0ms interval 100.0ms ecn
>  Sent 1046332742 bytes 987960 pkt (dropped 4062, overlimits 0 requeues 0)
>  backlog 0b 0p requeues 0
>   maxpacket 9084 drop_overlimit 2816 new_flow_count 155299 ecn_mark 1470
>   new_flows_len 0 old_flows_len 3
>
> >
> > -Toke
> >
> > _______________________________________________
> > Babel-users mailing list
> > Babel-users at alioth-lists.debian.net
> > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/babel-users



-- 

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740