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By default, the netmask configured for an VM instance is /32 and only ARP requests for the default gateway are answered by the Google metadata server.
When providing a dedicated NIC to the Solaris guest system, that is, the internal IP address of the interface is not configured on the Linux level, but on the Solaris level, please note the following points:
- The netmask on Solaris has to be set to a value that includes the default gateway (e.g., /24). Otherwise, Solaris will return an error when setting the default gateway (network unreachable).
- If Solaris should communicate with systems on the same subnet, it currently needs a static ARP entry for these systems (
arp -s <target-ip> <target-mac>). This is because the ARP requests sent by Solaris for the MAC addresses of these systems will not be answered by the Google metadata server and they will not be forwarded to the target system.
Routing between VPCs
If a VM instance has more than one NIC, each NIC must be in a different VPC. Routing between VPCs is not enabled by default. It has to be enabled through a mutual VPC peering configuration as shown in the sample below:
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