# Copying Release Files from One Router to Another

When you have copied the release files from a network host to one router, you can transfer files from that router to other routers on the network. This feature is useful when:

- The other routers are unreachable from the network host but have network connectivity to the router on which you installed the new software.
- The connection between routers is faster than the connection between a router and the network host to which it is connected.

The procedures for transferring release files from a source router to a destination router are almost identical to transferring release files from a network host to a router on the same side of the firewall.

| Note: You must enable the FTP server on the source router.

To transfer release files from a source router to a destination router, follow the instructions in Installing Software When a Firewall Does Not Exist, with the following changes:

- Substitute the source router for the network host.
- Omit the step about copying the release files to the network host.
- Copy the file to the system space of the second router from the user space of the first router.

  Be sure to specify the correct software release (.rel) filename for the router you are using, as described in Identifying the Software Release File.

  For example:

  host1#copy boston:/outgoing/releases/erx_x-y-z.rel erx_x-y-z.rel