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Link aggregation between NetBSD agr and Linux bond interfaces
I'm trying to aggregate two openvpn links between a Linux server
(debian) and a NetBSD client (running 7.0.2). I have done some test with
a 7.99.43 kernel/userland on an AlphaStation with the same result.
I suppose I have understood agr capabilities, I use it with a
switch for a long time without trouble.
On Linux side, I have started two openvpn servers (UDP
configuration). Each VPN runs on a different VDSL2 link. I don't have
openvpn configuration issue as this configuration runs fine without
aggregation. I have stopped all firewalls on both servers.
+- eth0 (LAN)
+- eth1 (WAN ISP1)
+- eth2 (WAN ISP2)
+- tap1 (UDP on ISP1)
+- tap2 (UDP on ISP2)
I have added in /etc/network/interfaces:
iface bond0 inet static
slaves tap1 tap2
# 4 = 802.3ad, I have tried round-robin (0)
and I obtain a bond0 interface.
On NetBSD side, I have tried to configure a new agr interface
+- wm0 (WAN)
+- tap0 (to Linux's tap1)
+- tap1 (to Linux's tap2)
+- agr0 (wm1 + wm2, 802.3ad)
wm1 and wm2 are linked into agr0:
legendre# cat ifconfig.agr0
inet 192.168.10.128 netmask 255.255.255.0
!ifconfig wm1 up
!ifconfig wm2 up
I have tried to create a new agr1 interface but it doesn't work as
expected. Maybe I have misunderstood something.
ifconfig create agr1 creates a new interface. I have to add and remove
agrports. Thus, I have written openvpn up and down scripts to add and
remove agrports. Problem : when a tunnel stops, tap interface is
dismounted and ifconfig returns :
agr1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
agrport: , flags=0x3<COLLECTING,DISTRIBUTING>
agrport: tap1, flags=0x3<COLLECTING,DISTRIBUTING>
Please note that tap0 is replaced by '' and this port cannot be
delete anymore. I have added persist-tun option in openvpn configuration
and problem disappears.
I have created agr interface by hand (openvpn without inet/inet6
parameters and I have added network configuration directly on agr1
interface). I haven't obtain a running aggregated tunnel. I have tried
to use link0 and -link0 parameters without success.
Even with interfaces up on both sides, tunnel is unusable.
Is it possible to write a configuration to aggregate two openVPN
links between a Linux server an a NetBSD client ?
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