Default VRF:
<routing-system xmlns="urn:brocade.com:mgmt:brocade-common-def">
<router>
<router-bgp xmlns="urn:brocade.com:mgmt:brocade-bgp">
<address-family>
<ipv6>
<ipv6-unicast>
<default-vrf>
<neighbor>
<af-ipv6u-ipv4-attr-holder>
<af-ipv6u-ipv4-neighbor>
<af-ipv4-neighbor-address>
2.2.2.2
</af-ipv4-neighbor-address>
<additional-paths>
<addpath-disable/>
</additional-paths>
</af-ipv6u-ipv4-neighbor>
</af-ipv6u-ipv4-attr-holder>
</neighbor>
</default-vrf>
</ipv6-unicast>
</ipv6>
</address-family>
</router-bgp>
</router>
</routing-system>
User defined VRF:
<routing-system xmlns="urn:brocade.com:mgmt:brocade-common-def">
<router>
<router-bgp xmlns="urn:brocade.com:mgmt:brocade-bgp">
<address-family>
<ipv6>
<ipv6-unicast>
<af-ipv6-vrf>
<af-ipv6-vrf-name>red</af-ipv6-vrf-name>
<neighbor>
<af-ipv6u-vrf-ipv4-attr-holder>
<af-ipv6u-ipv4-neighbor>
<af-ipv4-neighbor-address>
2.2.2.2
</af-ipv4-neighbor-address>
<additional-paths>
<addpath-disable/>
</additional-paths>
</af-ipv6u-ipv4-neighbor>
</af-ipv6u-vrf-ipv4-attr-holder>
</neighbor>
</af-ipv6-vrf>
</ipv6-unicast>
</ipv6>
</address-family>
</router-bgp>
</router>
</routing-system>