# BGP ipv6 routing over an ipv4 bgp session

**URL:** <https://legacy-community.ine.com/t/bgp-ipv6-routing-over-an-ipv4-bgp-session/3867>\
**Category:** CCNP Enterprise\
**Tags:** networking, ine, lab\
**Created:** [July 8, 2023, 5:27pm UTC](https://legacy-community.ine.com/t/bgp-ipv6-routing-over-an-ipv4-bgp-session/3867 "2023-07-08T17:27:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![major133-ac9365513dd](https://avatars.discourse-cdn.com/v4/letter/m/f4b2a3/32.png) [@major133-ac9365513dd](https://legacy-community.ine.com/u/major133-ac9365513dd)\
**Post date:** [July 8, 2023, 5:27pm UTC](https://legacy-community.ine.com/t/bgp-ipv6-routing-over-an-ipv4-bgp-session/3867/1 "2023-07-08T17:27:29Z")

</div>

Hi @Network_Eric  
this configuration from CCNP Route 300-101 book page 680  
ipv6 unicast-routing  
! \*\*\* OUTPUT OMITTED \*\*\*  
router bgp 64701  
neighbor [198.51.100.2](https://198.51.100.2) remote-as 64702  
!  
address-family ipv4  
network [192.0.2.0](https://192.0.2.0)  
neighbor [198.51.100.2](https://198.51.100.2) activate  
exit-address-family  
!  
address-family ipv6  
network 2000:1::/64  
neighbor [198.51.100.2](https://198.51.100.2) activate  
neighbor [198.51.100.2](https://198.51.100.2) route-map IPV6-NEXT-HOP out  
exit-address-family  
! \*\*\* OUTPUT OMITTED \*\*\*  
route-map IPV6-NEXT-HOP permit 10  
set ipv6 next-hop 2000:2::1  
why do we need this command :-  
address-family ipv6  
neighbor 198.51.10.2 activate  
??i don`t understand what is this command is used for?