IPv6 forwarding doesn't work
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I have three Virtual Machines: A, B, C.
Machine A and Machine C connected to each other through the B.
Their config:
A's IP: 2000::ffff:50a:b0b/120
C's IP: 2000::ffff:50a:d0d/120
Machine B has two interfaces - eth0 and eth1
IP of eth0 - 2000::ffff:50a:b0c/120
IP of eth1 - 2000::ffff:50a:d0e/120
I've set sysctl -w net.ipv6.conf.all.forwarding=1 at Machine B
Also, at machines A and C I've set default gateways:
At A
ip -6 ro add default via 2000::ffff:50a:b0c
At C
ip -6 ro add default via 2000::ffff:50a:d0e
I want to ping machine C from A and vice versa.
The strange thing, that most part of ICMP packets are lost with message
Address unreachable
routing ipv6 ping forwarding
asked May 9 at 12:24
Evgeniy
61
 |Â
show 1 more comment
up vote
0
down vote
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I have three Virtual Machines: A, B, C.
Machine A and Machine C connected to each other through the B.
Their config:
A's IP: 2000::ffff:50a:b0b/120
C's IP: 2000::ffff:50a:d0d/120
Machine B has two interfaces - eth0 and eth1
IP of eth0 - 2000::ffff:50a:b0c/120
IP of eth1 - 2000::ffff:50a:d0e/120
I've set sysctl -w net.ipv6.conf.all.forwarding=1 at Machine B
Also, at machines A and C I've set default gateways:
At A
ip -6 ro add default via 2000::ffff:50a:b0c
At C
ip -6 ro add default via 2000::ffff:50a:d0e
I want to ping machine C from A and vice versa.
The strange thing, that most part of ICMP packets are lost with message
Address unreachable
routing ipv6 ping forwarding
asked May 9 at 12:24
Evgeniy
61
I instead use a bridge interface if the same subnet is on two different interfaces of a host
– thrig
May 9 at 14:41
Which virtualization system are you using, and what type of interface (host, NAT, bridge, etc.) do the VMs have to the host?
– ErikF
May 9 at 16:16
If the addresses in your examples are the actual addresses you are using, I would strongly suggest using Unique Local Addresses instead, and with/64subnets instead of/120.
– Johan Myréen
May 9 at 20:10
/120 means they are in different subnets, so it's routed. Reproducing the very same configuration with 3 network namespaces (linux) works fine here.
– A.B
May 11 at 20:29
@A.B i don't know why, but the problem was in neighbor table. I manually set mapping between ip and mac addresses and it works fine
– Evgeniy
May 16 at 10:10
 |Â
show 1 more comment
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have three Virtual Machines: A, B, C.
Machine A and Machine C connected to each other through the B.
Their config:
A's IP: 2000::ffff:50a:b0b/120
C's IP: 2000::ffff:50a:d0d/120
Machine B has two interfaces - eth0 and eth1
IP of eth0 - 2000::ffff:50a:b0c/120
IP of eth1 - 2000::ffff:50a:d0e/120
I've set sysctl -w net.ipv6.conf.all.forwarding=1 at Machine B
Also, at machines A and C I've set default gateways:
At A
ip -6 ro add default via 2000::ffff:50a:b0c
At C
ip -6 ro add default via 2000::ffff:50a:d0e
I want to ping machine C from A and vice versa.
The strange thing, that most part of ICMP packets are lost with message
Address unreachable
routing ipv6 ping forwarding
asked May 9 at 12:24
Evgeniy
61
I have three Virtual Machines: A, B, C.
Machine A and Machine C connected to each other through the B.
Their config:
A's IP: 2000::ffff:50a:b0b/120
C's IP: 2000::ffff:50a:d0d/120
Machine B has two interfaces - eth0 and eth1
IP of eth0 - 2000::ffff:50a:b0c/120
IP of eth1 - 2000::ffff:50a:d0e/120
I've set sysctl -w net.ipv6.conf.all.forwarding=1 at Machine B
Also, at machines A and C I've set default gateways:
At A
ip -6 ro add default via 2000::ffff:50a:b0c
At C
ip -6 ro add default via 2000::ffff:50a:d0e
I want to ping machine C from A and vice versa.
The strange thing, that most part of ICMP packets are lost with message
Address unreachable
routing ipv6 ping forwarding
asked May 9 at 12:24
Evgeniy
61
asked May 9 at 12:24
Evgeniy
61
asked May 9 at 12:24
Evgeniy
61
asked May 9 at 12:24
Evgeniy
61
61
I instead use a bridge interface if the same subnet is on two different interfaces of a host
– thrig
May 9 at 14:41
Which virtualization system are you using, and what type of interface (host, NAT, bridge, etc.) do the VMs have to the host?
– ErikF
May 9 at 16:16
If the addresses in your examples are the actual addresses you are using, I would strongly suggest using Unique Local Addresses instead, and with/64subnets instead of/120.
– Johan Myréen
May 9 at 20:10
/120 means they are in different subnets, so it's routed. Reproducing the very same configuration with 3 network namespaces (linux) works fine here.
– A.B
May 11 at 20:29
@A.B i don't know why, but the problem was in neighbor table. I manually set mapping between ip and mac addresses and it works fine
– Evgeniy
May 16 at 10:10
 |Â
show 1 more comment
I instead use a bridge interface if the same subnet is on two different interfaces of a host
– thrig
May 9 at 14:41
Which virtualization system are you using, and what type of interface (host, NAT, bridge, etc.) do the VMs have to the host?
– ErikF
May 9 at 16:16
If the addresses in your examples are the actual addresses you are using, I would strongly suggest using Unique Local Addresses instead, and with/64subnets instead of/120.
– Johan Myréen
May 9 at 20:10
/120 means they are in different subnets, so it's routed. Reproducing the very same configuration with 3 network namespaces (linux) works fine here.
– A.B
May 11 at 20:29
@A.B i don't know why, but the problem was in neighbor table. I manually set mapping between ip and mac addresses and it works fine
– Evgeniy
May 16 at 10:10
I instead use a bridge interface if the same subnet is on two different interfaces of a host
– thrig
May 9 at 14:41
I instead use a bridge interface if the same subnet is on two different interfaces of a host
– thrig
May 9 at 14:41
Which virtualization system are you using, and what type of interface (host, NAT, bridge, etc.) do the VMs have to the host?
– ErikF
May 9 at 16:16
Which virtualization system are you using, and what type of interface (host, NAT, bridge, etc.) do the VMs have to the host?
– ErikF
May 9 at 16:16
If the addresses in your examples are the actual addresses you are using, I would strongly suggest using Unique Local Addresses instead, and with
/64 subnets instead of /120.– Johan Myréen
May 9 at 20:10
If the addresses in your examples are the actual addresses you are using, I would strongly suggest using Unique Local Addresses instead, and with
/64 subnets instead of /120.– Johan Myréen
May 9 at 20:10
/120 means they are in different subnets, so it's routed. Reproducing the very same configuration with 3 network namespaces (linux) works fine here.
– A.B
May 11 at 20:29
/120 means they are in different subnets, so it's routed. Reproducing the very same configuration with 3 network namespaces (linux) works fine here.
– A.B
May 11 at 20:29
@A.B i don't know why, but the problem was in neighbor table. I manually set mapping between ip and mac addresses and it works fine
– Evgeniy
May 16 at 10:10
@A.B i don't know why, but the problem was in neighbor table. I manually set mapping between ip and mac addresses and it works fine
– Evgeniy
May 16 at 10:10
 |Â
show 1 more comment
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I instead use a bridge interface if the same subnet is on two different interfaces of a host
– thrig
May 9 at 14:41
Which virtualization system are you using, and what type of interface (host, NAT, bridge, etc.) do the VMs have to the host?
– ErikF
May 9 at 16:16
If the addresses in your examples are the actual addresses you are using, I would strongly suggest using Unique Local Addresses instead, and with
/64subnets instead of/120.– Johan Myréen
May 9 at 20:10
/120 means they are in different subnets, so it's routed. Reproducing the very same configuration with 3 network namespaces (linux) works fine here.
– A.B
May 11 at 20:29
@A.B i don't know why, but the problem was in neighbor table. I manually set mapping between ip and mac addresses and it works fine
– Evgeniy
May 16 at 10:10