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Nov
22
comment Add a VLAN tag to specific UDP port traffic
Eugene M. Zheganin: Why is it a "violation of basic network principles"? The IPv4 address "belongs" to the entire machine (having a single interface to the world) but still I need to use a separate VLAN just for management of other devices, while "regular" traffic is handled untagged. Is it a MUST to have another IPv4 just because I also use a VLAN interface?
Nov
22
comment Add a VLAN tag to specific UDP port traffic
Thanks for the warning about tcpdump!
Nov
22
comment Add a VLAN tag to specific UDP port traffic
Updated original question: Can't use another IPv4 address
Nov
22
awarded  Editor
Nov
22
comment Add a VLAN tag to specific UDP port traffic
Totally agree. The VLAN is used to distinguish the switch management traffic from the rest. The adjacent switch is aware of this VLAN as well and (hopefully) handles it correctly. As I can only use a single routable IPv4 address on the machine, how else can I distinguish the traffic types?
Nov
22
revised Add a VLAN tag to specific UDP port traffic
Explain why can't use another IPv4 address for the VLAN interface
Nov
22
comment Add a VLAN tag to specific UDP port traffic
Can't add another IPv4 address to the VLAN interface, since the IPv4 in use for eth0 is the single one assigned and permitted to be used by net admin. This IPv4 is "globabally" routable and for some security reasons I can't get another...
Nov
22
asked Add a VLAN tag to specific UDP port traffic
Sep
24
awarded  Autobiographer
Sep
22
awarded  Popular Question
Jan
9
awarded  Supporter
Nov
5
awarded  Teacher
Feb
5
comment How to set up internal routing between virtual interfaces and real ethernet interface (Linux)
Thank you syneticon-dj! Didn't think that my fix is a "magical" one, just a fix that works. I'm using the macvlan option as the simplest (I'm aware of..) way to create a virtual interface that I can set its MAC address and get an IP address for it. Do you have another, better way (can be more complex, if it's better...)?
Feb
1
answered How to set up internal routing between virtual interfaces and real ethernet interface (Linux)
Dec
28
awarded  Student
Dec
28
comment How to set up internal routing between virtual interfaces and real ethernet interface (Linux)
The virtual interface I create is already "coupled" with the real Ethernet interface, so I guess they are already "bridged", no? Would you care, please, to explain the difference?
Dec
28
comment How to set up internal routing between virtual interfaces and real ethernet interface (Linux)
Thanks Nils! I wasn't aware of such an option. Doesn't adding a macvlan type of interface (as I do) the same as adding a layer2 device, like a bridge-device? BTW, the IP address for the virtual NIC is obtained through DHCP, by invoking a DHCP client process on the interface - Will this work with a bridge-device as well?
Nov
18
comment How to set up internal routing between virtual interfaces and real ethernet interface (Linux)
Each SNMP agent should be identified, by the MIB-browser, as having a distinct different IP address. This is mandatory by the spec I'm following.
Nov
18
asked How to set up internal routing between virtual interfaces and real ethernet interface (Linux)