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item in the near term. Time will tell how this technology will develop and be integrated into the

BNL infrastructure.

On the Wide-Area Networking (WAN) side, new direct access, policy-based connectivity

between BNL, IN2P3, and GRIDKA is in-place and operational. This "shortcut" allows direct

access between several European collaborations and BNL. As mentioned previously, the required

Tier-1 to Tier-1 link between BNL and Triumf is also operational. Additionally, there is Layer-2

redundancy between the BNL Internet routers (Amon and Mutt) and the ESnet BGP demark

router. This capability allows a secondary 10 gigabit interface to "fill-in" in the event of a

primary interface failure on either the BNL or ESnet routing equipment. Additionally, in the near

term, the Layer-3 routing through the BNL perimeter will be segmented through the use of

Internal BGP. In the final configuration, Internet router Mutt will handle the routing for Atlas,

CERN, and the directly attached facilities while router Amon will provide access to the general

Internet and the commercial Internet providers. Lastly, there will be some limited layer-3

redundancy between these two BNL routers in the unlikely event of an equipment hardware or

software failure with the site perimeter equipment. Hopefully, a future enhancement would be to

allow each router to have live connectivity with each of the BGP peering. Unfortunately, this

would require reengineering the slash thirty links to the next lower netmask and necessitate some

downtime on the WAN links while the reconfigurations were occurring. Additionally, the BNL

Internet service providers would have to reconfigure their devices with the new network settings.

Additional Capabilities:

As mentioned previously, BNL is collaborating with Ultralight, ESnet and now Boston

University on the TerraPaths implementation. This project utilizes the Quality of Service (QOS)

in the IP protocol to provide dedicated bandwidth along a "virtual path" between discreet end-

points. To support this research effort, some of our older, SupII-based Cisco 6500's, have been

recycled for this effort. BNL and ESnet have reserved and provisioned a group of 50 VLANS for

the exclusive use of this program.

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