# linux driver and port numbers

**URL:** <https://forums.digi.com/t/linux-driver-and-port-numbers/7130>\
**Category:** Realport\
**Created:** [August 21, 2007, 1:22pm UTC](https://forums.digi.com/t/linux-driver-and-port-numbers/7130 "2007-08-21T13:22:30Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![haasd](https://avatars.discourse-cdn.com/v4/letter/h/f08c70/32.png) [@haasd](https://forums.digi.com/u/haasd)\
**Post date:** [August 21, 2007, 1:22pm UTC](https://forums.digi.com/t/linux-driver-and-port-numbers/7130/1 "2007-08-21T13:22:30Z")

</div>

When install the realport driver and add a new device the port numbers come up 0-15 (for a 16 port device). This can’t be how it is supposed to work- the device numbers no longer correspond to the port numbers written on the portserver. We are migrating from HPUX and this change is going to cause us major difficulties. Is there a reason why the change was made to offset the portserver numbers from the device numbers?

---

<div class="post-metadata">

**Author:** ![userid0](https://avatars.discourse-cdn.com/v4/letter/u/f6c823/32.png) [@userid0](https://forums.digi.com/u/userid0)\
**Post date:** [August 21, 2007, 2:13pm UTC](https://forums.digi.com/t/linux-driver-and-port-numbers/7130/2 "2007-08-21T14:13:45Z")

</div>

I do not know the primary reason for the port numbering. However, you could create symbolic links to the desired naming scheme. For example:

# ln -s /dev/ttya00 /dev/ttyaa01