I have a route table:

Kernel IP routing table
Destination       Gateway         Genmask         Flags Metric Ref    Use Iface UH    0      0        0 vmbr0 U     0      0        0 vmbr0          UG    0      0        0 vmbr0

Does the UH    0      0        0 vmbr0

mean, that there is no mediator (router) to this device (, i.e. devices (current and are directly connected? So the packet could be send directly to the device (, with the help of arp routing table, extracting from there the MAC of

Or am I misunderstanding that and it means: if destination IP is look this table further and match the rule, i.e. then route it to the

It seems to be very basic, but I cannot find anything clearly, unambiguous explainable this staff. If there is some good articles, I would appreciate to read them.

migrated from serverfault.com Jul 16 '13 at 21:45

This question came from our site for system and network administrators.


Yes, is directly connected to the same layer2-network and your host is configured to address it directly (with the help of a local arp lookup), not using a router.

The iproute2-tool is probably also worth a look:

/bin/ip route show

gives you another view on the routing table and

/bin/ip route get

also gives you the answer to "what interface, source IP address and gateway is being used when I'm trying to access".

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