bras

A broadband remote access server (BRAS or BBRAS) routes traffic to and from the digital subscriber line access multiplexers (DSLAM) on an Internet service provider's (ISP) network.

The BRAS sits at the core of an ISP's network, and aggregates user sessions from the access network. It is at the BRAS that an ISP can inject policy management and IP Quality of Service (QoS).

The specific tasks include:

Aggregates the output from DSLAMs

Provides user PPP sessions over IP or ATM sessions

Enforces quality of service (QoS) policies

Routes traffic into an Internet service provider’s backbone network

A DSLAM collects data traffic from multiple subscribers into a centralized point so that it can be uploaded to the router over a Frame Relay, ATM, or Ethernet connection.

The router provides the logical termination for PPP sessions. These may be PPP over Ethernet (PPPoE) or PPP over ATM (PPPoA) encapsulated sessions. By acting as the PPP termination point, the BRAS is responsible for assigning session parameters such as IP addresses to the clients. The BRAS is also the first IP hop from the client to the Internet.

The BRAS is also the interface to authentication, authorization and accounting systems (see RADIUS)

ahemdabad and bangaluru serial blast rocks india

Medical staffs assist a man injured in one of a series of blasts which rocked the city of Ahmedabad. (AFP Photo) More Pictures AHMEDABAD: Terror struck Gujarat when 17 serial blasts ripped across the city on Saturday evening leaving 15 killed and 30 injured sending a wave of panic. The synchronised explosions in the space of 90 minutes in the eastern and western areas after the first blast hit Maninagar at 6.45 pm occurred in 13 places. There were two blasts each in Maninagar--the constituency of Chief Minister Narendra Modi--and in Sarkej targeting a state transport CNG bus and Sangam theatre. Significantly two hospitals were also the target of attack. An NSG team has been rushed to Ahmedabad. The low-intensity explosions occurred at eight areas of Maninagar, Isanpur, Narol circle, Bapunagar, Hatkeshwar and Sarangpur bridge, Sarkej and Odhav and created a wave of panic. There were two blasts in Maninagar and the first blast occurred in this area at 6.45 PM. The second blast here occurred near LG hospital. Maninagar is the constituency of Chief Minister Narendra Modi. The Ahmedabad blasts came a day after the multiple explosions in Bangalore in which two persons were killed. The mobile network in the area has completely collapsed. Police said at least two had died and 25 injured, some of them seriously, in the blasts. The injured have been rushed to civil hospital and LG hospital. Union Minister of State for Home Sriprakash Jaiswal said in New Delhi there were eight blasts. Unconfirmed reports said there were 13 blasts. The explosion in the sensitive Sarkej area occurred in a CNG bus. Some of the bombs were believed to have been placed in cycles eerily similar to the Jaipur blasts on May 13 in which 65 persons died. A couple of bombs were reported to have been placed in tiffin boxes in a modus operandi similar to the explosions outside a Lucknow court last year.