> For the complete documentation index, see [llms.txt](https://docs.switchboard.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.switchboard.xyz/how-it-works/switchboard-protocol/running-a-switchboard-oracle/configuration-tweaking-configurations/cfg-00-common-vars.cfg.md).

# cfg/00-common-vars.cfg

common vars

We'll now go through the file content, one chuck and variable at a time:

```bash
# customize the data below according to your setup
EMAIL="YOUR@EMAIL.IS.NEEDED.HERE" # change this to be your E-MAIL
```

This variable should simply contain a reference email that will be used for certificates and future reference.

```bash
IPv4="0.0.0.0" # add the external IPv4 address of your cluster
IPv6="0000::0000" # add the external IPv6 address of your cluster (optional)
```

This are the PUBLIC STATIC IPs associated with your Oracle.\
\
Right now we're only using IPv4 but we plan to include soon support for IPv6 too, so leave IP6 at "0000::0000: for now.

```bash
CLUSTER_DOMAIN="${IPv4}.xip.switchboard-oracles.xyz"
```

This is a DNS record that points to the IP specified above.\
If you don't have a DNS record, you can leave it as written and it will automatically resolve to your IP address.

```bash
# this URL should always be a MAINNET non rate-limited RPC (even when using devnet)
TASK_RUNNER_SOLANA_RPC="https://api.mainnet-beta.solana.com"
```

Regardless of installing a `devnet` or `mainnet` Oracle you should add here your own RPC pool for `mainnet` that is NOT rate limited or you may find that some Oracle operations will have a hard time going through.

You're free to use the one we specify there, but it's quite possible that your Oracle will be frequently heavy rate limited in the requests it sends to that RPC.

Toward the end of the file, you'll see a comment similar to:

```
##########
!!! - DO NOT CHANGE ANYTHING BELOW THIS POINT - !!!
##########
```

Unless you know what you're doing or you're in direct contact with a member of the Switchboard team, NEVER change anything below this line.