bgpd: Fix 'show bgp ipv4 vpnv4 statistics' cli.

When attempting to use the 'show bgp ipv4 vpnv4 statistics' cli, the safi
choosen is BGP_MPLS_LABELED_VPN which is #defined to 128.  The afi/safi
combination is fed to bgp->rib, which limits the size of the safi to BGP_SAFI_MAX
which is #defined to 5.   The correct value to use is BGP_MPLS_VPN

The bgp code differentiates between the actual safi value for BGP_MPLS_LABELED_VPN
used defined by RFC 4364, to a internal SAFI value used to limit array size.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Tested-by: NetDEF CI System <cisystem@netdef.org>
1 file changed