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[renluop]

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rhost = bras-red5.bs
I saw this in my router's log and being curious  would like to what it means or tells ta router's user

[waltergmw]

This fault example might inform you a little more:-

http://status.aaisp.net.uk/?incident=212

Kind regards,
Walter

[renluop]

So it's something to do with a remote failure? Only Google got me to sites for red bras
I suppose Red means fouled up and the number the seriousness of the event?

[roseway]

No, I don't think it's anything to do with remote failures. The link that Walter gave is about the temporary failure of a shared resource called 21CN-BRAS-RED5-L-FAR. All that your log entry is saying is that you are connected to something called bras-red5.bs.

[renluop]

Thanks Roseway!

I was going to ask about the bs at the end: perhaps not

[kitz]

It is indeed information about which RAS you are connected to - in your case Reading, LAC (router)  5.

Which RAS.

Theres a few routers (speedtouch) which logs the RAS details, which is where first stage of authentication occurs and a major part of your routing.  

Not sure either what the bs is about lol.  
Normally they are labelled which identifies the type of equipment, for example .erx would be a Juniper ERX

[orainsear]

.bs - are you geographically located to be connecting to a Bristol RAS?

[renluop]

I'm near Bournemouth

[kitz]

Although Bristol has a 21CN core node, it doesnt actually have a RAS there.   
Theres only 11 bRAS locations with red being the code for Reading.  far = faraday, man = manchester, eal = ealing etc

At the RAS there are clusters of LACs (think huge routers which converge all the connections from different DSLAMS/MSANs) 5 will be the 'cluster' which your exchange is connected to.
For example I used to be connected via MAN5, yet a friend in the next town was connected via MAN3.

Still no idea what the .bs stands for but if they follow the old convention then it will be related to the type of equipment.

for eg

man5.esr5 =  Location:- Manchester.  LAC no 5.  edge router = Cisco ESR router number 5
man3.erx7 =  Location: - Manchester. LAC no 3.  edge router = Juniper ERX router number 7

the first thing that springs into my head for bs when its router related, (and Im very probably wrong in this case) but it would be something like B Series.

[kitz]

All lines on 21CN-BRAS-RED5-L-FAR dropped at 2010-05-03 20:15:30

Thats just a BT status report looks like the 21CN link between Reading5 and Faraday dropped.   
The new 21CN topology has been designed so that if one of the major links fails, then it can be fairly quickly re-routed via a secondary link.  A drop will just be a minor blip though and probably go un-noticed by most.

[kitz]

Funny enough a similar question was just asked in another thread, so I'll explain a wee bit more.

Ok..  you have all the links from all around the country.  Each dslam/msan will obviously have a fibre link to the RAS..  so theres like thousands of these all over the place.

They all converge at the RAS.   Although we think of the RAS as a location its actually a location which has huge amounts of routers etc, which will converge say the ATM links on to the Colossus core network.

I find it easier to explain on the old network, 21CN will be similar but it also has different tiers, so for simplicity (and time) I'll stick with the 20CN role model.  
This is a very simplistic view, but it should give you an idea of what goes on.

Each msan has a fibre link to the RAS.

The fibre link coming in connects to an Edge Router, which converges a few hundred links MSAN into one..  Up to this point its ATM network.

This edge router then forwards these on to an Access Concentrator.
Each LAC will be taking in connections from several different Edge Routers - converging the traffic again. 
The LAC is kind of the entry point to the BTw Colossus Network (IP) and puts your traffic on the main BT backbone, for forwarding on to your ISP.




-----

Both 20CN and 21CN require authentication on to the BTw network,  authentication is carried out at the RAS when we first boot up our routers,  regardless or not if the line is on 21CN and has a core node nearer your home location.

[renluop]

Tx I've more idea now, enough fro my little brain.