Domain Name Service Configuration

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LBNL Main site (lbl.gov)

The LBNL main site uses an anycast address, back-ended by multiple nameservers, to handle dns requests depending on your location on the network. Using the anycast address provides automatic redundancy during maintenance periods on the nameservers. The vast majority of computers should use this anycast address and no second DNS server is required. If you are running a caching only nameserver forward to ns.lbl.gov.

Hostname

IP address

ns.lbl.gov

131.243.5.1

ALS (als.lbl.gov)

ALS uses an anycast address backed by multiple nameservers located on ALS subnets. Using the anycast address provides automatic redundancy during maintenance periods on the nameservers. All ALS computers should use this anycast address and no second DNS server is required.

Hostname

IP address

nsals.lbl.gov

131.243.5.2

NERSC (nersc.gov)

Computers on  the NERSC network in CRT at LBNL or Oakland should use the NERSC anycast address.

Hostname

IP address

ns.nersc.gov

128.55.208.1

Managing DNS records

LBNL provides the IP request application, which allows users to add, change existing or deleted DNS records, as well as update host contact and location information.

Reserving a hostname

There are a very small number of situations where it is necessary to reserve a hostname. In the vast majority of situations, IP request allows near-real time modification. However, if you do need to reserve a hostname, create a cname pointing to reserved.lbl.gov. 


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