MikroTik

daniel

The vpnv4 routes are seen in /routing bgp vpnv4-route> print. But there is no way to see what is announced to the customer via eBGP. About the topology: Variant 1: BGP over VRF (no MPLS) Provider Network: routers interconnected by L2 tunnels (tried all variations, let's assume EoIP - to keep it simp...

daniel

I am trying to set up an VPN for a customer, using eBGP to talk to the customer. I first tried using "pure" BGP and VRF -- set up L2 tunnels between each site and on each site ran BGP within an VRF. Each of my BGP routers would connect to the customer router (customer facing interface is i...

daniel

Christmas was good time for it indeed, but.. didn't found any under my tree :)

daniel

Well, I have few hundred RouterOS sites (including towers) running OSPF. OSPF on RB532 is one of my nightmares! Wherever possible, I go to reconfigure these to do bridging and .. maybe, will start using separate (non RouerOS based) machines to do the (OSPF) routing. By the way, if you run hotspot, y...

daniel

By the way, aside from power voltage monitoring, it would be very nice if the RouterBOARDs can shut down if the power supply is under some voltage.
I have seen lots of cases, where wireless modules lose their config, or sometimes (happens a lot with CM9) have their configuration eeprom destroyed.

daniel

The tricky part here is OSPF. I have been experiencing extremely bad behavior of the RB532s (32MB RAM) when it comes to OSPF. The routing process inevitably crashes and is not restarted -- you have to either restart the unit, or reconfigure OSPF for it to be started again. Maybe, the 64MB version wi...

daniel

It seems, that after a while, recent RouterOS versions will lose OSPF routing. This happens most often on RouterBOARDs, probably due to memory overflow. My diagnosis of this problem is that the OSPF router process dies and nothing is setup to bring it back up. It will recover after tricking to to re...

daniel

I can confirm that it works with 2.9.25 with the post-2.9.25 setting.. Compaq hp8440 with intel 3945abg.

It was funny fighting all day with this issue on a holiday, next to the hotspot antenna and not able to connect. :roll:

daniel

If you want to test it, just load the current software - either 2.8.27 or 2.9rc6 - it will work for 24 hours with all features, without license. If you like what you see, just purchase the license and import it in the router (it will continue working).

Daniel

daniel

This is with 2.8, and on a point-to-point link. No others are expected to connect and hide-ssid=yes, so this are not ranbom connects. Also, the messages occur in series, many at the sme time, with different MAC address!

daniel

I am getting these messages in the router log, at burts: jun/05/2005 18:09:37 wlan1: deauth data sender, 00:0B:11:11:7E:5C jun/05/2005 18:09:37 wlan1: unauth or missing data sender, 00:0B:11:11:C1:5C jun/05/2005 18:09:37 wlan1: deauth data sender, 00:0B:11:11:C1:5C jun/05/2005 18:09:37 wlan1: unauth...

daniel

there was a contest (i think in the USA) for link-range a few months ago. the winning team did 85km at 11mbit/s, using 3m 50dBi dishes. Wow, would they be accepting competition from Bulgaria? :-) [we could even accept USA made antennas] We get much better results with much better smaller antennas. ...

daniel

Alignment mode would show you received data even if you set single packet out of thousands (you can't associate under such conditions). It also gives better signal strenght reading, quicker changing.

You aim the antenna faster with align mode.

Daniel

daniel

I have posted my test results with nstreme2 a while ago. I am planning some more tests on new non-live links (that would not have the real world traffic and thus provide better results). Stephen: I agree with your comments on nstreme2 requirements. My experiments so far suggest that the lenght of th...

daniel

expect is a good tool ("language") to learn, it makes life much easier for any "interactive" style connection, but of course, everyone is tempted to use other tools such as plain ssh or various programming languages. One particular thing to be aware of is the treatment of stderr ...

daniel

you will need 3 500watt solar panels about 400 each 4 l-16 deep cycle batt. main system 120 ea 4 golf cart 150 batt back up 60 ea 2 charger systems 40-100 ea. Would you please share the source of this equipment, especially the solar panels? this is the recommend system . you could save by using a w...

daniel

I believe the biggest issue is the salt water area. A while ago, I was unsucessful to get a 15km link, where all other conditions seemed perfect. Maybe indeed horizontal polarization is the answer (but then, wouldn't that exibit more reflections form the surface?)

Daniel

daniel

Our focus is getting the solution running well with small, cool-running motherboards in external-grade packages that will tower-mount and survive all weather conditions. That way, the RF cables (and losses) will be short. CPU heat dissipation at these rates seems to be a key issue. Stephen, were yo...

daniel

Hi Sonny, Some of the other users on the forum have quoted 50Mbps half duplex at 35km which is quite phenomenal. Here are more 'precise' numbers. Please note that this test is done on a live link, that already carried over 10 Mbps Internet traffic (that is, not large packet traffic). The setup is p...

daniel

i was told 2.4GHz-G is 802.11g only! in the winbox there is 2.4GHz-B, 2.4GHz-G and a new 2.4GHz-G only. Is it new within 2.8.15? it is not in the changelog nor the documentation?! Well, as it seems various standalone APs already support b/g years ago. The 802.11g protocol has explicit support for '...

daniel

I have had good results with the EPIA-5000 (500MHz, fanless). It is of course lower performance - I was looking at the higher-end EPIA boards, but don't have real test results yet.

Daniel

daniel

so we asked the customers what they want, and they want small powerfull machines that DON'T LOOK LIKE A Pc...(don't ask me why) Look on the RouterBOARD product line The only really disturbing problems I find with RouterBOARD are: 1. It is really low performance platform, especially considering the ...

daniel

I think there are hardly any changes between .15 and .16 (or none) for nstreme -- so we will have to think a little on this. John John, My view on this is, that the nstreme protocol tries to switch speeds between send/receive in order to accomodate the different traffic allocation in each direction...

daniel

Another interesting question is what exactly is ccq :)

What are 'good' values and what 'not so good' - useful is also to know what are 'awful' etc. (this is the minimum, assuming technology is some sort of trade secret)

Daniel

daniel

> I know the Atheros protocol is supposed to handle all the speed shifts etc, but it really does not perform well. yeah, we don't live in world of miracles... :) Sorry, I meant the MikroTik driver is supposed to do the speed shifts. I too had similar problem with strong signal level and poor perfor...

daniel

My observation is relative, and no real measurement was made with proper tools, but: On a perfectly working wireless network, with frequencies 5745, 5765, 5785 and 5805 MHz, when switching to nstreme v13, most links experience very bad performance. When spacing the frequencies more than 20MHz apart ...

daniel

I have found rather strange behavior of nstreme v13 (and v11 and v12 I believe) with this module. It would perform much worse than the MikroTik brand 5G/ABM, signal levels lower than the expected (due to lower power output). I had even an setup, where it would not connect at 1-2km distance (with rat...

daniel

You should also set rate-set=configured

I found ot this option and indeed it helps get long distance links work better. I know the Atheros protocol is supposed to handle all the speed shifts etc, but it really does not perform well.

Daniel

daniel

The problem with MAC telnet after you do /system reset is that, by default all interfaces on the RouterOS are disabled. As far as I am aware, it is not possible to connect via MAC telnet to disabled Ethernet interface.

Daniel

daniel

I am using revision 8 of nstreme everywhere in that part of the network (on around 30 MikroTik routers). Is it correct to assume, that timeouts on nstreme revision 8 interfaces are only likely when the station disconnects from the AP. (all links are point to point) If the client disconnects from the...

daniel

It was mentioned, that packet loss is not expected when nstreme is used (or at least I understood it this way :) However, I get consistent packet loss of 1-2% in a 14 hop link (example). The latency is not very high so I expect that none of the links overloads. Routers are ~40-50% loaded, which seem...

daniel

If no default IP address, there could be DHCP client autoconfigured on the unit's primary Ethernet interface.

daniel

I have an MikroTik router that runs as PPTP server for the directly attached subnet 192.168.50.0/24. Subnet 192.168.51.0/24 is routed to another MikroTik router ove Atheros wireless link. The IP address used for the pptp server is 192.168.50.2. Trouble is, clients from 192.168.51.0/24 cannot connect...

daniel

I have noted, that when the RouterOS clients that use Windows XP with firewall enabled on the interface would disconnect after 15 minutes (actually 933 seconds according to the RouterOS logs).

Disabling the firewall on the Windows XP client 'solves' this problem.

Any ideas?

daniel

It seems you still need to mark traffic and use queue trees if the customer has non-contiguous address space.

daniel

Please re-read feature chart. It shows _no N-streme support_ for Cisco Aironet interfaces. N-streme is compatible _only_ with Atheros-based cards. My problem is not that Cisco Aironet interfaces do not support nstreme (I really don't care, because these are legacy links anyway), but that when the n...

daniel

What is new in nstreme revision 8?

The features chart shows support for Cisco Aironet interfaces, but the actual packages does not recognize such cards. (I have tested with both PCI cards and LMC cards)

Daniel

daniel

Cisco a/b/g cards are based on their own Radiata chipset (company that they purchased a while ago). Nothing to do with Atheros.

As always, their chipset may be better for end-user applications, as they are not likely to release API etc.

Daniel

daniel

Are you using revision 7 with v2.8.11? John Yes. In fact, revision 7 has improved things somewhat, but still large fluctuation in RTT. I have tested this on my famous 57km link and to my dismay, after installing 2.8.11 revision 7 there were huge RTT values (300-500ms) with significant packet loss. ...

daniel

I am seeing severe increase in latency when in nstreme mode. On an 54km link (but also on 2-3km links!) I see strange behavior - when in normal mode the ping RTT is 1-2ms (at that time link carries approx 1mbit traffic). When in nstreme mode, RTT varies from 8 to 60ms .. rarely 1-3 ms. Shouldn't the...

daniel

Ths 35Mbit at 57km is with non-turbo mode, unidirectional, with random-data=no. Machines on both ends are 700MHz C3. During the test, both routers (that have few more Atheros interfaces each), were not transporting traffic. Daniel What size/make Antennas and/or amplifiers are you using to establish...

daniel

The nstreme-dual interface is still not seen by OSPF. Any idea when this will be fixed?

Daniel

daniel

What is new with nstreme revision6?

daniel

John, What do you mean that packets will never be lost? Do you mean, that packets get lost only on congestion? I have found, that restricting the higher rates sometimes helps keep the RTT values reasonable. As far as I understand the specifications of the Athros chipset, it will have higher output p...

daniel

Ths 35Mbit at 57km is with non-turbo mode, unidirectional, with random-data=no. Machines on both ends are 700MHz C3. During the test, both routers (that have few more Atheros interfaces each), were not transporting traffic. With unidirectional traffic, CPU load is around 30. With bidirectional traff...

daniel

John, I can confirm that it shows 35 Mbps in bandwidth-test over 57km link. This, when the link is not loaded with other traffic of course, and with both revision 4 and revision 5. As far as I could tell, revision 4 too, handled somehow the framing-mode setting for single radio setup. (in short, I c...

daniel

One feature I liked in the Aironet (now Cisco) wireless equipment was the software distribution feature. When you have large network, it makes a lot of sense to load new software on one of the units, and have it distribute it to others. This is especially useful if/when you plan to install new "...

Search found 47 matches

Re: BGP and VRF

BGP and VRF

unauth data sender?

nstreme v13 bandwidth usage?

nstreme v13 with SENAO SL-5354MP ARIES

nstreme and packet loss

RouserOS pptp server on routed subnets

RouterOS pptp-server disconnect

nstreme revision 8

nstreme latency