Symptom
If the relayed dhcp packet is supposed to be forwarded through the l3vni, it is failing to forward.
From debug ip packet we see:
Jun 20 11:50:08.348: IP: s=0.0.0.0 (Vlan100), d=255.255.255.255, len 343, input feature, MCI Check(109), rtype 0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE
*Jun 20 11:50:08.349: IP: s=0.0.0.0 (Vlan100), d=255.255.255.255, len 343, rcvd 2
*Jun 20 11:50:08.349: IP: s=0.0.0.0 (Vlan100), d=255.255.255.255, len 343, stop process pak for forus packet
*Jun 20 11:50:08.349: IP: tableid=2, s=10.0.100.1 (local), d=10.0.200.2 (Vlan123), routed via FIB
*Jun 20 11:50:08.349: IP: s=10.0.100.1 (local), d=10.0.200.2 (Vlan123), len 343, sending
*Jun 20 11:50:08.349: IP: s=10.0.100.1 (local), d=10.0.200.2 (Vlan123), len 343, encapsulation failed
Conditions
- SVI configured as dhcp relay
- dhcp server reachable via the vxlan l3vni
