RIP interface limit #13143

Ramesses3 · 2023-03-29T18:35:07Z

Ramesses3
Mar 29, 2023

Hello,
I'm new to FRR, so don't "beat" me )
In my "router rip" section i have alot of "network" definitions (about 50) for my gre tunnel interfaces.
The problem:
Only EXACT 20 FIRST interfaces have RIP enabled, other part does not.

What's wrong? How to fix it and make RIP enabled for all my defined interfaces?

Thanks alot!

Answered by rwestphal

Mar 30, 2023

The problem:
Only EXACT 20 FIRST interfaces have RIP enabled, other part does not.

You might want to try adjusting your sysctl settings by running the command: sysctl net.ipv4.igmp_max_memberships=1000. It's worth noting that some distros have default sysctl settings that may not be the best fit for a software router. If you're interested in learning more about sysctl settings, I recommend checking out this link: https://github.com/FRRouting/frr/blob/master/doc/user/Useful_Sysctl_Settings.md.

View full answer

Ramesses3 · 2023-03-30T07:13:33Z

Ramesses3
Mar 30, 2023
Author

More infiormaation:

RIP part of my /etc/frr/frr.conf

!
router rip
 network 192.168.113.4/30
 network 192.168.114.4/30
 network 192.168.115.4/30
 network 192.168.116.4/30
 network 192.168.117.4/30
 network 192.168.118.4/30
 network 192.168.119.4/30
 network 192.168.120.4/30
 network 192.168.121.4/30
 network 192.168.122.4/30
 network 192.168.123.4/30
 network 192.168.124.4/30
 network 192.168.125.4/30
 network 192.168.137.4/30
 network 192.168.143.4/30
 network 192.168.144.4/30
 network 192.168.145.4/30
 network 192.168.103.4/30
 network 192.168.104.4/30
 network 192.168.105.4/30
 network 192.168.106.4/30
 network 192.168.107.4/30
 network 192.168.108.4/30
 network 192.168.109.4/30
 network 192.168.110.4/30
 network 192.168.111.4/30
 network 192.168.112.4/30
 network 192.168.126.4/30
 network 192.168.127.4/30
 network 192.168.127.12/30
 network 192.168.128.4/30
 network 192.168.128.12/30
 network 192.168.129.4/30
 network 192.168.130.4/30
 network 192.168.132.4/30
 network 192.168.133.4/30
 network 192.168.134.4/30
 network 192.168.135.4/30
 network 192.168.211.4/30
 network 192.168.3.4/30
 network 192.168.221.4/30
 network 192.168.221.12/30
 network 192.168.222.4/30
 network 192.168.222.12/30
 network 192.168.223.4/30
 network 192.168.223.12/30
 network vlan10
 network vlan100
 version 2
exit
!

Output of sh ip rip status

Routing Protocol is "rip"
  Sending updates every 30 seconds with +/-50%, next due in 1 seconds
  Timeout after 180 seconds, garbage collect after 120 seconds
  Outgoing update filter list for all interface is not set
  Incoming update filter list for all interface is not set
  Default redistribution metric is 1
  Redistributing:
  Default version control: send version 2, receive version 2 
    Interface        Send  Recv   Key-chain
    tun3        2     2      
    tun4        2     2      
    tun5        2     2      
    tun13       2     2      
    tun14       2     2      
    tun15       2     2      
    tun16       2     2      
    tun17       2     2      
    tun18       2     2      
    tun19       2     2
    tun20       2     2      
    tun21       2     2      
    tun22       2     2      
    tun23       2     2      
    tun24       2     2      
    tun25       2     2      
    tun37       2     2      
    tun43       2     2      
    tun44       2     2      
    tun45       2     2      
  Routing for Networks:
    192.168.3.4/30
    192.168.103.4/30
    192.168.104.4/30
    192.168.105.4/30
    192.168.106.4/30
    192.168.107.4/30
    192.168.108.4/30
    192.168.109.4/30
    192.168.110.4/30
    192.168.111.4/30
    192.168.112.4/30
    192.168.113.4/30
    192.168.114.4/30
    192.168.115.4/30
    192.168.116.4/30
    192.168.117.4/30
    192.168.118.4/30
    192.168.119.4/30
    192.168.120.4/30
    192.168.121.4/30
    192.168.122.4/30
    192.168.123.4/30
    192.168.124.4/30
    192.168.125.4/30
    192.168.126.4/30
    192.168.127.4/30
    192.168.127.12/30
    192.168.128.4/30
    192.168.128.12/30
    192.168.129.4/30
    192.168.130.4/30
    192.168.132.4/30
    192.168.133.4/30
    192.168.134.4/30
    192.168.135.4/30
    192.168.137.4/30
    192.168.143.4/30
    192.168.144.4/30
    192.168.145.4/30
    192.168.211.4/30
    192.168.221.4/30
    192.168.221.12/30
    192.168.222.4/30
    192.168.222.12/30
    192.168.223.4/30
    192.168.223.12/30
    vlan10
    vlan100
  Routing Information Sources:
    Gateway          BadPackets BadRoutes  Distance Last Update
    192.168.103.6            0         0       120   00:00:20
    192.168.104.6            0         0       120   00:00:02
    192.168.105.6            0         0       120   00:00:12
    192.168.106.6         1453         0       120   00:00:19
    192.168.107.6         2991         0       120   00:00:12
    192.168.109.6         3003         0       120   00:00:00
    192.168.110.6         2990         0       120   00:00:09
    192.168.111.6         2984         0       120   00:00:14
    192.168.112.6         2976         0       120   00:00:06
    192.168.114.6            0         0       120   00:00:05
    192.168.115.6            0         0       120   00:00:18
    192.168.116.6            0         0       120   00:00:25
    192.168.117.6            0         0       120   00:00:05
    192.168.118.6            0         0       120   00:00:18
    192.168.119.6         2019         0       120   00:00:08
    192.168.120.6            0         0       120   00:00:24
    192.168.121.6            0         0       120   00:00:17
    192.168.122.6            0         0       120   00:00:14
    192.168.123.6            0         0       120   00:00:30
    192.168.124.6            0         0       120   00:00:10
    192.168.125.6            0         0       120   00:00:19
    192.168.126.6         2986         0       120   00:00:14
    192.168.127.6         2983         0       120   00:00:14
    192.168.129.6         2906         0       120   00:00:06
    192.168.130.6         2985         0       120   00:00:24
    192.168.134.6         1006         0       120   00:00:05
    192.168.135.6         2960         0       120   00:00:27
    192.168.137.6            0         0       120   00:00:16
    192.168.143.6            0         0       120   00:00:18
    192.168.144.6            0         0       120   00:00:03
    192.168.145.6            2         0       120   00:00:08
    192.168.211.6         2980         0       120   00:00:02
    192.168.222.6         1464         0       120   00:00:29
    192.168.223.6         1458         0       120   00:00:25
  Distance: (default is 120)

As you can see RIP enabled only for 20 interfaces, but most of them (except 5) are up and running.

debug rip events show alot of
2023/03/30 10:23:09 RIP: [WKXTG-05F8M] RIP is not enabled on interface tunXXX.

0 replies

rwestphal · 2023-03-30T12:30:54Z

rwestphal
Mar 30, 2023
Collaborator

The problem:
Only EXACT 20 FIRST interfaces have RIP enabled, other part does not.

You might want to try adjusting your sysctl settings by running the command: sysctl net.ipv4.igmp_max_memberships=1000. It's worth noting that some distros have default sysctl settings that may not be the best fit for a software router. If you're interested in learning more about sysctl settings, I recommend checking out this link: https://github.com/FRRouting/frr/blob/master/doc/user/Useful_Sysctl_Settings.md.

1 reply

Ramesses3 Mar 30, 2023
Author

You made my day!
Just checked value of net.ipv4.igmp_max_memberships and it is 20. Exactly what i expected.
Will try to increase it tomorrow.

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RIP interface limit #13143

Ramesses3 Mar 29, 2023

Replies: 2 comments · 1 reply

Ramesses3 Mar 30, 2023 Author

rwestphal Mar 30, 2023 Collaborator

Ramesses3 Mar 30, 2023 Author

Ramesses3
Mar 29, 2023

Replies: 2 comments 1 reply

Ramesses3
Mar 30, 2023
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rwestphal
Mar 30, 2023
Collaborator

Ramesses3 Mar 30, 2023
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