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# MRT
This page explains how to play with GoBGP's MRT feature.
## Prerequisites
Assume you finished [Getting Started](https://github.com/osrg/gobgp/blob/master/docs/sources/getting-started.md).
## Contents
- [Inject routes from MRT table v2 records](#section0)
- [Dump updates in MRT BGP4MP format](#section1)
- [Configuration](#section1.1)
## <a name="section0"> Inject routes from MRT table v2 records
Route injection can be done by
```bash
$ gobgp mrt inject global <dumpfile> [<number of prefix to inject>]
```
## <a name="section1"> Dump updates in MRT BGP4MP format
### <a name="section1.1"> Configuration
With the following configuration, gobgpd continuously dumps BGP update
messages to `/tmp/updates.dump` file in the BGP4MP format.
```toml
[global.config]
as = 64512
router-id = "10.0.255.254"
[[neighbors]]
[neighbors.config]
peer-as = 65001
neighbor-address = "10.0.255.1"
[[mrt-dump]]
dump-type = "updates"
file-name = "/tmp/updates.dump"
```
Also gobgpd supports log rotation; a new dump file is created
periodically, and the old file is renamed to a different name. With
the following configuration, gobgpd creates a new dump file every 180
seconds such as `/tmp/20160510.1546.dump`. The format of a name can be
specified in golang's
[time](https://golang.org/pkg/time/#pkg-constants) package's format.
```toml
[global.config]
as = 64512
router-id = "10.0.255.254"
[[neighbors]]
[neighbors.config]
peer-as = 65001
neighbor-address = "10.0.255.1"
[[mrt-dump]]
dump-type = "updates"
file-name = "/tmp/log/20060102.1504.dump"
interval = 180
```
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