Hi, I have about a dozen routerboards mainly running 11b cards but more recently 11a cards (Atheros 5212 a/b/g cards) These are wonderful boards and I continue to learn how to best use them. Thanks to John and everyone at Mikrotik for such creations.
Here are a few questions that I have accumulated over time and I’m hoping to find answers to:
I occasionally have a routerboard lock up where I cannot ping any interfaces, console in, or perform a supout, etc. Any ideas? This happens randomly and doesn’t appear associated with heat. Sometimes the routerboard is inside at 72* and sometimes it is in a hot attic but locks up at 8am when it is cool, so that is why say it doesn’t appear to be environmental. Sometimes it lasts a few days and sometimes a few weeks but rarely do they run for months/years like our many non-routerboard Miktrotik “thin router” boxes (mini-itx).
I could operate early routerboards anywhere from about 20v to 48vdc. But the newer ones will not operate on my 24vdc systems. What’s up with that? Do they now require 48vdc?
I have one 5.3GHz link that instead of getting the expected 10-11Mbps, I get about 500kbps to about 4Mbps tops with about 1Mbps on average. Sometimes it will climb up to 9Mbps and then suddenly drop back off. Spectrum Analyzer shows the band is clean. Any tips on where to look or how to proceed? Could the 266MHz CPU be getting crunched?
Sometimes, but not always, when I reboot a routerboard, then I have to reboot any routerboards (relays) downsteam from this “main” routerboard. Has anyone seen anything like this? It’s almost like a ARP issue where one host doesn’t hear a broadcast or else doesn’t respond or something. But the two routerboards cannot see each other until the second is rebooted and then everything is fine. I’m thinking of trying statically defined ARP tables to see if this clears up. Is that worth a try?
– Please send us a supout file and we can check, so far I have not heard of a differentiation by customers that mini-itx board are more stable, maybe this is a software issue
I could operate early routerboards anywhere from about 20v to 48vdc. But the newer ones will not operate on my 24vdc systems. What’s up with that? Do they now require 48vdc?
– There has been no change in the power supply parts or design. What happens when you plug in 24V?
I have one 5.3GHz link that instead of getting the expected 10-11Mbps, I get about 500kbps to about 4Mbps tops with about 1Mbps on average. Sometimes it will climb up to 9Mbps and then suddenly drop back off. Spectrum Analyzer shows the band is clean. Any tips on where to look or how to proceed? Could the 266MHz CPU be getting crunched?
– Send the supout and we will check or perhaps start checking for the standard things. Water in the antenna cable…
Sometimes, but not always, when I reboot a routerboard, then I have to reboot any routerboards (relays) downsteam from this “main” routerboard.
– Sounds like an OSPF issue, the current vesion doesn’t have any preblems reported.
Has anyone seen anything like this? It’s almost like a ARP issue where one host doesn’t hear a broadcast or else doesn’t respond or something. But the two routerboards cannot see each other until the second is rebooted and then everything is fine. I’m thinking of trying statically defined ARP tables to see if this clears up. Is that worth a try?
I can’t when the board is locked up and won’t even accept a serial connection. This is a rare event but when it happens, it is random with regards to which board locks up. I’d say that this happens about once per month.
The board won’t boot up.. I noticed this when I started to piggyback routerboards off of my Trango powersupplies which are rated at 20vdc (but output a little higher). My first batch or two of routerboards worked fine but recent batches won’t operate off the Trango powersupply. I now do the reverse and use a 48vdc powersupply and use dc to dc converters to step down 48v down to 20vdc for the Trango radio. This works fine but the dc to dc converters cost quite a bit.
I solved this today. I had two radios only 20MHz apart and I seem to need 40MHz of separation between frequency settings. Can you comment about this? Also I don’t seem to get the lower part of the 5.15-5.25 band. I’ve tried 5180 and 5200 but I can’t get anything under 5240 to work..
Not using OSPF but rather static routing at this time.