[FROG] Getting Started...

Donald Sharp sharpd at cumulusnetworks.com
Tue Jun 13 19:06:49 EDT 2017


Richard -

You use sysctl to increase the number of route entries, on my home
system I have this:
sharpd at robot ~/f/zebra> sysctl  net.ipv4.route.max_size
net.ipv4.route.max_size = 2147483647
sharpd at robot ~/f/zebra> sysctl net.ipv6.route.max_size
net.ipv6.route.max_size = 4096
sharpd at robot ~/f/zebra>

To set these values:
sharpd at robot ~/f/zebra> sudo sysctl -w net.ipv6.route.max_size=8192
[sudo] password for sharpd:
net.ipv6.route.max_size = 8192
sharpd at robot ~/f/zebra> sysctl net.ipv6.route.max_size
net.ipv6.route.max_size = 8192
sharpd at robot ~/f/zebra>

These are temporary values.  To modify at reboot edit /etc/sysctl.conf
with the value you want.

I've also sent you a slack invite so you can log into slack and
discuss this there for a quicker resolution.

donald

On Tue, Jun 13, 2017 at 6:16 PM, Richard J Palmer <richard at merula.net> wrote:
> OK
>
> I have done that ....
>
> BUT after restarting I am now seeing ....
>
> ZEBRA: netlink-cmd (NS 0) error: Invalid argument, type=RTM_NEWROUTE(24),
> seq=1554090, pid=0
> repeated lots of times - I am trying a reboot (as that has cleared this
> before ....). And after a reboot those errors have gone ...
>
> NOW I know this is normally down to the kernel routing table size... BUT I
> have as yet not found guidance on how to set this correctly for routers.
>
> I'm actually willing to pay for some help getting these running correctly as
> a one off if anyone would be interested in helping / advising ...
>
> I think the setup is close here ... Just trying to determine what I am
> missing ...
>
> Thanks in advance
>
> Richard
>
> Richard Palmer | Director | Merula Limited
> Company Registered in England and Wales No. 3243995
> 5 Avro Court, Huntingdon, Cambridgeshire, PE29 6XS
> Phone 01480 222940 | Support 0845 330 0666
> Support Email support at merula.net
>
>
> --- Original message ---
> Subject: Re: [FROG] Getting Started...
> From: Donald Sharp <sharpd at cumulusnetworks.com>
> To: Richard J Palmer <richard at merula.net>
> Cc: <frog at lists.frrouting.org>
> Date: Tuesday, 13/06/2017 2:21 AM
>
> Run ./configure with a --enable-multipath=X Where X is not 1.
>
> donald
>
> On Mon, Jun 12, 2017 at 9:14 PM, Richard J Palmer <richard at merula.net>
> wrote:
>
> Hi there
>
> I am testing FRR as an alternative to Quagga on what is a very busy core
> router - with multiple full table BGP Sessions.
>
> I am currently using this on Slackware 14.2 ... I have things up and running
> and some of the quagga bugs seem to have been cleared which is a PLUs BUT I
> am seeing oddness - most obviosuly with IPv6.
>
> Running a traceroute from a server behind it is alternating between
>
> traceroute6 l.root-servers.net
> traceroute to l.ROOT-SERVERS.NET (2001:500:9f::42) from 2a00:1940:0:1::78,
> 30 hops max, 24 byte packets
>    1 lon1-gw1.merula.net (2a00:1940:0:1::70) 0.647 ms 0.389 ms 0.425 ms
>    2 2a00:1940:0:1::67 (2a00:1940:0:1::67) 0.454 ms 0.565 ms 2.283 ms
>    3 2001:7f8:17::8480:1 (2001:7f8:17::8480:1) 0.753 ms 0.662 ms 0.728 ms
>    4 2a00:1a80:0:1::5:2 (2a00:1a80:0:1::5:2) 7.458 ms 5.662 ms 5.59 ms
>    5 l.root-servers.net (2001:500:9f::42) 5.727 ms 5.722 ms 5.726 ms
>
> and
>
> traceroute6 l.root-servers.net
> traceroute to l.ROOT-SERVERS.NET (2001:500:9f::42) from 2a00:1940:0:1::78,
> 30 hops max, 24 byte packets
>    1 lon1-gw1.merula.net (2a00:1940:0:1::70) 0.481 ms * 0.682 ms !N
>    2 lon1-gw1.merula.net (2a00:1940:0:1::70) 0.614 ms !N 0.54 ms !N 0.529
> ms !N
>
> The zebta.log file is filled with lines like:
> 2017/06/13 02:11:01 ZEBRA: zread_ipv6_add: Prefix 2402:2700:d1::/48 has 2
> nexthops, but we can only use the first 1
> 2017/06/13 02:11:01 ZEBRA: zread_ipv6_add: Prefix 2402:2700:d2::/48 has 2
> nexthops, but we can only use the first 1
> 2017/06/13 02:11:01 ZEBRA: zread_ipv6_add: Prefix 2402:2700:d3::/48 has 2
> nexthops, but we can only use the first 1
> 2017/06/13 02:11:01 ZEBRA: zread_ipv6_add: Prefix 2402:2700:d4::/48 has 2
> nexthops, but we can only use the first 1
> 2017/06/13 02:11:01 ZEBRA: zread_ipv6_add: Prefix 2402:2700:d5::/48 has 2
> nexthops, but we can only use the first 1
> 2017/06/13 02:11:01 ZEBRA: zread_ipv6_add: Prefix 2402:2700:d6::/48 has 2
> nexthops, but we can only use the first 1
> 2017/06/13 02:11:01 ZEBRA: zread_ipv6_add: Prefix 2402:2700:d7::/48 has 2
> nexthops, but we can only use the first 1
> 2017/06/13 02:11:01 ZEBRA: zread_ipv6_add: Prefix 2402:2700:d8::/48 has 2
> nexthops, but we can only use the first 1
>
> and so on....
>
> What am I missing here - I am sure it is probbay something really obvious
> ...
>
> Can you help point me the right way ?
>
> Thanks!
>
> Richard
>
>
>
>
> Richard Palmer | Director | Merula Limited
> Company Registered in England and Wales No. 3243995
> 5 Avro Court, Huntingdon, Cambridgeshire, PE29 6XS
> Phone 01480 222940 | Support 0845 330 0666
> Support Email support at merula.net
>
>
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> frog at lists.frrouting.org
> https://lists.frrouting.org/listinfo/frog
>
>



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