Re: [AFMUG] icmp redirects

Tue, 23 Dec 2014 16:43:50 -0800 

I have no idea. Probably need to ask Cambium support.

On 12/23/2014 10:56 AM, Dennis Burgess via Af wrote:


10.0.0.2 255.255.255.255  10.0.0.2         et1   OTHER

x.x.160.17 255.255.255.255  x.x.160.17   rf2   ICMP

x.x.160.12 255.255.255.255  x.x.160.12   rf2   ICMP

10.20.167.1 255.255.255.255  10.20.167.1      rf2   OTHER

Here is an example of this.  Note two routes for /32s from ICMP..

Dennis Burgess, CTO, Link Technologies, Inc.
[email protected] <mailto:[email protected]> – 314-735-0270 – www.linktechs.net <http://www.linktechs.net>
*From:*Af [mailto:[email protected]] *On Behalf Of *LTI - Dennis Burgess via Af 
*Sent:* Tuesday, December 23, 2014 10:29 AM
*To:* [email protected]
*Subject:* Re: [AFMUG] icmp redirects
Maybe, is the fix simply to move them to their own subnet ? The customer states that prior to putting a MT router in he never had the issue with his Cisco.
On Thu, Dec 18, 2014 at 11:55 AM, George Skorup (Cyber Broadcasting) via Af <[email protected] <mailto:[email protected]>> wrote:
I think what you're running into is the annoying ARP cache on Canopy. If you're on the same L2 segment, but completely different IP subnet, it still caches your IP/MAC pair. There's no way, at least that I know, to clear it, you have to reboot the radio. Telnet in and run 'arp -a' and you'll see what I mean. 

On 12/18/2014 11:32 AM, Dennis Burgess via Af wrote:

    So, have had this issue before, with ICMP redirects and Canopy
    equipment.� Basically a MT by default will send a ICMP redirect,
    and the canopy device adds a route into its routing table,
    regardless if its correct or not, then can�t access that device
    from the specific IP that that redirect was for until I reboot the
    canopy device clearing that entry.� MT has added the ability NOT
    to send ICMP redirects, but once its done, I don�t think of
    anything but a reboot of the canopy will fix it..�

    �

    Any other alternatives to this?� Route delete does not work on
    the canopy.�

    �

    Thanks,

    �

    DennisBurgessSignature

    www.linktechs.net <http://www.linktechs.net> � 314-735-0270
    <tel:314-735-0270> � [email protected]
    <mailto:[email protected]>

    �



--
*_Dennis Burgess, Mikrotik Certified Trainer_**Author of "Learn RouterOS- Second Edition <http://www.wlan1.com/product_p/mikrotik%20book-2.htm>” 
 Link Technologies, Inc -- Mikrotik & WISP Support Services
Office*: 314-735-0270 *Website*: http://www.linktechs.net <http://www.linktechs.net/> – *Skype*: linktechs *//**/-- Create Wireless Coverage’s with /*www.towercoverage.com <http://www.towercoverage.com/>*//*/–*900Mhz – LTE – 3G – 3.65 – TV Whitespace */

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