Tag Archives: routerboard

Queue outside please!

New toys you say?

More gadgets Q?


Noticed this little gem in the MikroTik wiki this morning while reviewing Queue Types.

Note: Starting from v5.8 there is new kind none and new default queue only-hardware-queue. All RouterBOARDS will have this new queue type set as default interface queue

only-hardware-queue leaves interface with only hw transmit descriptor ring buffer which acts as a queue in itself. Usually at least 100 packets can be queued for transmit in transmit descriptor ring buffer. Transmit descriptor ring buffer size and the amount of packets that can be queued in it varies for different types of ethernet MACs.

Having no software queue is especially beneficial on SMP systems because it removes the requirement to synchronize access to it from different cpus/cores which is expensive.

multi-queue-ethernet-default can be beneficial on SMP systems with ethernet interfaces that have support for multiple transmit queues and have a linux driver support for multiple transmit queues. By having one software queue for each hardware queue there might be less time spent for synchronizing access to them.

Note: having possibility to set only-hardware-queue requires support in ethernet driver so it is available only for some ethernet interfaces mostly found on RBs.

Note: improvement from only-hardware-queue and multi-queue-ethernet-default is present only when there is no “/queue tree” entry with paticular interface as a parent.

What does this mean in laymans terms?

1. The only-hardware-queue will be available initially only for Routerboard devices and perhaps some other supported ethernet chipsets in the future.

2. The basic interface queueing is removed from being passed to the CPU and done on the interface hardware directly which should result in a net performance increase.

3. For SMP (x86 boxes with multiple CPU cores) machines with high end interfaces (1GB, 10GB) there is a queue type that allows a queue to be broken up across multiple CPU cores to match the multiple TX and RX chains offered on these interfaces.

MikroTik new product announcements – October 2011

Live here at Las Vegas, Normis has just finished announcing the new products; some new and exciting info about the RB2011 as well as more details on known models.



– Low cost series
– Rackmount or Desktop
– 5xGigabit, 5x100Mbit
– SFP/USB/WiFi models
– Available December

Model Table

Type Board Board Desktop Board
SFP + + +
USB + +
Wireless +
Serial + +
LCD + +
New product descriptor lettering:
RM – 1U Rackmount models
IN – Indoor/Desktop models
For example RB2011-US-2HnD-IN (Red labeled box up the top) or this RB2011L-RM
Currently 7 variants planned to release gradually from December to February

Greg has some more details on other offerings (SXT 6 Pack, RB751, RB1100AH, Groove 2.4) over on his post here.

The death and resurrection of an RB450

Recently I’ve had 2 RB450’s come across my desk as “dead” units.

1 was the victim of a power surge, the other had just stopped working at some point.
As these were both going to visit the bin otherwise, I claimed both units in the hope that I might be able to use my limited grasp of electronics to fix them.

As it turns out thou, both had exactly the same problem.. namely busted capacitors.

This iswhat broken capacitors look like! (pop-tops)

So, I checked the specifications on the popped caps and picked up the closest suitable replacments I could find:

Originals: 6.3v 560uF

Replacements: 10v 470uF (20 cents each)

Used soldering iron and some wick to remove the solder on the existing ones, popped em out and swapped in the new.

Hey Presto, working RB450!

Repair job glamour shot!

There’s a thread on the mikrotik forums about other people having similar problems, which seems to have been traced back to a batch of bad caps.

Either way, handy for anyone who has a dead one that’s either out of warranty or you’re too lazy to RMA 🙂

RB1100 review coming soon.

I’ve been offered an RB1100 to review which I’ll be receiving later this week. The RB1100 is the successor to the RB1000 with more than double the ports and some unique features.. more on this later.

Expect a review here sometime over the weekend when I’ve had a bit of a play 🙂

Greg Sowell (a guru who’s blog provides me with many helpful bits of information) has some more of the details here: http://gregsowell.com/?p=1587