Hi,
I’m experiencing problem with the nd protocol.
I have two nodes, on each of them I have a vf and the underlying pf are
directly connected through a physical link. In node 1, networking is handled by
the kernel. In node 2, vpp 20.01 takes care of it.
On both nodes I have configured an ipv6 address (3001::1/64 an 3001::2/64). In
vpp, I enabled ip6 on the vf and brought the interface up.
The output of show ip6 interfaces is:
VirtualFunctionEthernet3/0/0 is admin up
Link-local address(es):
fe80::250:56ff:fe87:4611
Joined group address(es):
ff02::1
ff02::2
ff02::16
Neighbor Discovery: enabled
ICMP redirects are disabled
ICMP unreachables are not sent
ND DAD is disabled
Advertised Prefixes:
MTU is 9000
ICMP error messages are unlimited
ICMP redirects are disabled
ICMP unreachables are not sent
ND DAD is disabled
ND advertised reachable time is 0
ND advertised retransmit interval is 0 (msec)
ND router advertisements are sent every 200.0 seconds (min interval is
150.0)
ND router advertisements live for 600 seconds
Hosts don't use stateless autoconfig for addresses
ND router advertisements sent 1
ND router solicitations received 0
ND router solicitations dropped 0
If I ping from node 1 to node 2, I can see that neighbor solicitation packets
(with multicast mac address 33:33:ff:00:00:01) are sent to node 2, however from
the vpp I don’t see such packets.
Trace is empy as well as vpp counters (show hardware-interfaces) do not
increase. If I ping from node 2 to node 1 everything works fine.
It seems that packets with a multicast mac address are discarded by the vf, any
idea why? Might it be a driver problem (I’m using the uio_pci_generic and dpdk
version is 19.08.0)?
I doubled check the link connectivity by replacing the node running vpp, with a
node where the kernel handles the networking and everything works fine (ip6 nd
included).
Thanks,
Alberto
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