# BGP - Extended Community List

VyOS provides policies commands exclusively for BGP traffic filtering and
manipulation: **extcommunity-list** is one of them.

## Configuration

### policy extcommunity-list

```{cfgcmd} set policy extcommunity-list \<text\>

Creat extcommunity-list policy identified by name \<text\>.
```
```{cfgcmd} set policy extcommunity-list \<text\> description \<text\>

Set description for extcommunity-list policy.
```
```{cfgcmd} set policy extcommunity-list \<text\> rule \<1-65535\> action \<permit|deny\>

Set action to take on entries matching this rule.
```
```{cfgcmd} set policy extcommunity-list \<text\> rule \<1-65535\> description \<text\>

Set description for rule.
```
```{cfgcmd} set policy extcommunity-list \<text\> rule \<1-65535\> regex \<text\>

Regular expression to match against an extended community list, where text
could be:
* \<aa:nn:nn\>: Extended community list regular expression.
* \<rt aa:nn:nn\>: Route Target regular expression.
* \<soo aa:nn:nn\>: Site of Origin regular expression.
```