# Segment routing
**URL:** https://forum.networklessons.com/t/segment-routing/25643
**Category:** OSPF
**Created:** [April 1, 2022, 4:48am UTC](https://forum.networklessons.com/t/segment-routing/25643 "2022-04-01T04:48:18Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@equnguy](https://forum.networklessons.com/u/equnguy)
#### Post date: [April 1, 2022, 4:48am UTC](https://forum.networklessons.com/t/segment-routing/25643/1 "2022-04-01T04:48:18Z")
Dear all,
In OSPF segment routing, prefix SID is defined under loopback0 interface that belong area 0 toward to core side. However, we want segment routing also work at access side which belong area x which not include looopback0. Do you know which configuration in this case allow advertise label of loopback0 to access side via segment routing.
Thanks,
Quy
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### Author:  [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [April 5, 2022, 4:48am UTC](https://forum.networklessons.com/t/segment-routing/25643/2 "2022-04-05T04:48:35Z")
Hello Quy
It is possible to create a prefix SID under each interface. Take a look at this Cisco documentation:
> **[Segment Routing Configuration Guide, Cisco IOS XE Fuji 16.7.x - Segment...](https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/seg_routing/configuration/xe-16-7/segrt-xe-16-7-book/sr-ospfv2-node-sid.html#task_2FB798FA3A2D431DA1D39C2C3E52E6B9)**
>
> Hardcoded placeholder description!
I’m not sure if this completely answers your question, but if you have any other concerns, feel free to respond!
I hope this has been helpful!
Laz