Re: [Xen-users] veth0 is from netback and vifu.0 is fromthebridge-utils?

[Nivedita Singhvi <niv@xxxxxxxxxx>]

Anthony.Golia@xxxxxxxxxxxxxxxxx wrote:
> sorry to bring this up again but i'm still confused (i know things changed
> recently with peth0 and all).  so theres no more veth0?  whats peth0?
> (someone said it was the physical int, i thought that was eth0, eth1,
> etc.).  Also, i'm using vif-route not bridge:
>
> bash-3.00# ip addr
> 1: peth0: <BROADCAST,MULTICAST,NOARP,UP> mtu 1500 qdisc pfifo_fast qlen
> 1000
>     link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
> 2: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
>     link/ether 00:09:6b:b5:6b:95 brd ff:ff:ff:ff:ff:ff
>     inet 172.31.215.177/24 brd 172.31.215.255 scope global eth1
> 3: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>     inet 127.0.0.1/8 scope host lo
>     inet 172.31.254.207/32 brd 172.31.254.207 scope global lo:hostname
> 4: vif0.0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
>     link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
> 5: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
>     link/ether 00:09:6b:b5:6b:94 brd ff:ff:ff:ff:ff:ff
>     inet 172.31.205.177/24 brd 172.31.205.255 scope global eth0
> 6: xen-br0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
>     link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
> 7: vif1.1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
>     link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
>     inet 169.254.1.0/32 brd 169.254.1.0 scope global vif1.1
Anthony, what version/changeset are you running?
Any answer you get is probably true only for a range of changesets.

We're trying to put together some documentation of the networking
stack this week, once we clean up a few issues...

Firstly, you seem to be running in bridged mode - you have all the
infrastructure we create in the default bridge scripts (which we
don't in the default routing setup):

The 0 in the names below is the default, it will be $vifnum,
specific to your local script changes, otherwise...


              Domain0 network stack
                       ^^
                       ||
                       ||
              eth0 [local virtual interface]
                       ^^
                       ||
                       || local traffic intended for domain0
                       ||
                       ||
xen-br0 [bridge] <===> vif0.0 [virtual dom0]  <=======> eth0 [domU virtual nic]
  ||
  ||
  || external traffic
  ||
  VV
peth0 [real, physical interface]
  ||
--XX ------------ NETWORK -----------------


I'm trying to put together some documentation of the networking
stack this week, once a few issues get cleaned up. I started on
this lastweek but the stack has been a bit volatile (someone else
floated something similar more recently with some more text)..

Hope that helps for now..

thanks,
Nivedita



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