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From Vadim Kimlaychuk <Vadim.Kimlayc...@Elion.ee>
Subject Cloudstack management server networking and SSVM routing
Date Thu, 23 Apr 2015 13:40:26 GMT
Hi,

            When I got several networks on my management server I have noticed, that SSVM
routing table is weird.  It works so far, but I don’t understand why public traffic is routed
through local management interface (and NATed) when it can be sent directly to eth2 ?  Isn’t
it too complicated ?

Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         194.2.2.1    0.0.0.0         UG        0 0          0 eth2
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0
172.16.0.0      0.0.0.0         255.255.255.0   U         0 0          0 eth3
172.16.0.1      172.17.0.1      255.255.255.255 UGH       0 0          0 eth1
172.17.0.0      0.0.0.0         255.255.255.0   U         0 0          0 eth1
194.2.2.0    0.0.0.0         255.255.255.128 U         0 0          0 eth2
194.2.2.0    172.17.0.1      255.255.255.0   UG        0 0          0 eth1
194.2.2.3    172.17.0.1      255.255.255.255 UGH       0 0          0 eth1

Storage network here is 172.16.0.0, management – 172.17.0.0 and public – 194.2.2.0 (all
class C).  Management server itself – 194.2.2.3

            This is not a problem, I am just curious about unnecessary complexity. From my
point of view this layout is far from being optimal and contains excess routes

Thank you,

Vadim

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