Address family vpn4/ipv4 for EBGP

What is the difference between "address family vpnv4" and address family ipv4", do I have to configure both for an EBGP session ?
Thanks
NK

VPNv4 is used for the support of MPLS VPN as described by draft-ietf-l3vpn-rfc2547bis-03.
http://www.ietf.org/internet-drafts/draft-ietf-l3vpn-rfc2547bis-03.txt
IPv4 is for the support of regular ipv4 addresses.
You may need to enable vpnv4 or/and ipv4 depending on what you want to do.
Let me know if I answered your question,

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