Try something like this:
create tap host-if-name lstack host-ip4-addr 192.168.2.2/24 host-ip4-gw
192.168.2.1
set int ip address tap0 <vpp address on the 192.168.2.X/24 subnet> # vpp
interface in L3 mode
or
set int l2 bridge tap0 1 # vpp interface in L2 mode.
I use the latter setup in production on my vpp home gateway.
HTH... Dave
From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of vyshakh krishnan
Sent: Monday, November 25, 2019 1:29 PM
To: vpp-dev@lists.fd.io
Subject: [vpp-dev] tuntap interface in VPP
Hi,
Our requirement was to redirect the telnet packets to host OS from VPP so that
the kernel stack can reply to the telnet packet. And found that tuntap
interface in VPP is perfect for this.
I was able create tuntap interface using:
vpp# tap connect newtap
tapcli-0
vpp# show in
inacl interface
vpp# show interface
Name Idx State MTU (L3/IP4/IP6/MPLS)
Counter Count
local0 0 down 0/0/0/0
memif0/0 1 up 9000/0/0/0 rx packets
161
rx bytes
9096
tx packets
499
tx bytes
31437
drops
945
tx-error
785
tapcli-0 2 down 9000/0/0/0 drops
8
which created the following in host:
newtap: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::cc6c:feff:feed:ff11 prefixlen 64 scopeid 0x20<link>
ether ce:6c:fe:ed:ff:11 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 7 bytes 586 (586.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Can anyone please help me with the following questions:
1. How will we assign an IP to this host interface (newtap). Is there a way to
do this from VPP (set int ip addr tapcli-0
192.168.3.1/24<http://192.168.3.1/24> --> assigns IP only to VPP interface.)
2. How will host OS reply to the packets? Routing entries are known only to
VPP. is there a way to export these to host OS networking stack from VPP?
Thanks
Vyshakh
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