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mdkberry
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Posts: 70
Joined: Tue Jan 14, 2014 4:39 am

Odd ping issue across subnets on RB2011

Tue Feb 11, 2014 12:47 am

Hi

I am setting up a Mikrotik RB2011 in test before it goes live.

it has 3 subnets, all firewall blocked from each other. (not using VLANS as the switch will not support it, they cant afford to buy one that does at this time)
192.168.10.0/24
192.168.20.0/24
192.168.30.0/24 (wifi with DHCP on router)

and I am using 192.168.88.0/24 as the management subnet which can reach all the above. i.e. no firewall blocking.

the thing I am seeing when pinging from my OSX laptop (192.168.88.254/24) to a Cisco SPA504G phone (192.168.20.12/24)
is some weird ping responses as seen here,

PING 192.168.20.12 (192.168.20.12): 56 data bytes
64 bytes from 192.168.20.12: icmp_seq=0 ttl=63 time=1.152 ms
92 bytes from router (192.168.88.1): Redirect Host(New addr: 192.168.20.12)
Vr HL TOS Len ID Flg off TTL Pro cks Src Dst
4 5 00 0054 e069 0 0000 3f 01 ace4 192.168.88.254 192.168.20.12


I am also getting a similar issue on the other ethenet connected subnet when pinging a test PC (192.168.10.13/24 ) from the Management subnet same OSX laptop.

PING 192.168.10.13 (192.168.10.13): 56 data bytes
64 bytes from 192.168.10.13: icmp_seq=0 ttl=127 time=1.347 ms
92 bytes from router (192.168.88.1): Redirect Host(New addr: 192.168.10.13)
Vr HL TOS Len ID Flg off TTL Pro cks Src Dst
4 5 00 0054 4242 0 0000 3f 01 550b 192.168.88.254 192.168.10.13


I am not seeing these weird ping messages on the wifi subnet, but on that I am seeing long variable delays pinging to a test PC on the wifi subnet with ip address 192.168.30.250/24
delays for all pings between 2 - 8 ms but sometimes it jumps to 75ms or more.

I am concerned I have some issue with the traffic crossing the router, and would appreciate any suggestions to work out what the strange ping messages are on the OSX device. I usually just see straightforward ping lines not all the 'redirect host' info. Hopefully nothing serious but it has me foxed.
 
mdkberry
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Frequent Visitor
Topic Author
Posts: 70
Joined: Tue Jan 14, 2014 4:39 am

Re: Odd ping issue across subnets on RB2011

Fri Feb 14, 2014 4:22 am

this issue appears to be resolved since I had to reconfigure the router setup without 'bridge-local' (the default bridge that comes with RB2011 setup to bridge all the interfaces)

since removing it, for other reasons, I no longer have this issue.

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