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I have been working on getting networking setup with Xen on SLES 11 sp2 for over a week now and I am at a loss as to how to proceed. I have read every bit of documentation I could
find (most of which is incorrect in one or more ways), have googled and read everything I could find about the subject, and nothing works. I'm sure I must be missing something stupid, but for the life of me, I can't see what it is. So I am hoping that if
I explain what I'm trying to do here, someone will hit me upside the head with a clue by four and I can finally put this problem to bed.
Here is the situation:
All Dom0 hosts are in one subnet and are connected to a switch with ports configured for trunking. (I will use 172.16.211.0/24 in the following examples.)
The DomU hosts that will be built on these Dom0 servers will be in one of three different networks (depending on their purpose). My examples will use the following networks:
Dev: 172.16.213.0/24 VLAN: 1
Prod: 172.16.217.0/24 VLAN: 217
Train: 172.16.219.0/24 VLAN: 219
Admin: 172.16.211.0/24 VLAN: 211
So here is what we would like to have:
On the Dom0, we assign an IP address in the Dom0 network, ie. 172.16.211.100 and the default gateway for the system is 172.16.211.2.
We use vlan tagging to segregate traffic for the Dev, Prod, Admin and Train networks.
There are bridge devices created for each VLAN that get exported to the DomU's.
So for example:
Dom0:
Physical device: em1 is assigned IP address 172.16.211.100/24
There are VLANs created using vconfig as follows: vconfig add em1 213 (and so on for all 5 vlans)
There are bridge devices associated with each VLAN such that the brctl show command output looks like this:
# brctl show
bridge name bridge id STP enabled interfaces
br211 8000.047d7b16089b yes vlan211
br213 8000.047d7b16089b yes vlan1
br217 8000.047d7b16089b yes vif6.0
vlan217
br219 8000.047d7b16089c yes vif6.1
vlan219
and at the DomU level, vif6.0 shows as eth0 and vif6.1 shows as eth1.
In this case, the DomU has an ip address of 172.16.217.11 assigned to eth0.
My problem is this:
>From Dom0, I can ping my gateway 172.16.211.2 and since the switch knows about all of the VLANS, I can also ping 172.16.213.2, 172.16.217.2, etc. so basically, I can see the world, however, if I do an arping -I em1 to any of the network gateways except for
my default gateway, I get no response.
>From DomU, I can ping nothing. Not the gateway of 172.16.217.2 or anything else.
If from Dom0, I run a tcpdump -i br217, and from DomU, starting trying to ping my gateway, I see the following:
15:41:35.453693 arp who-has 172.16.217.2 tell 172.16.217.11
15:41:36.469757 arp who-has 172.16.217.2 tell 172.16.217.11
15:41:37.469629 arp who-has 172.16.217.2 tell 172.16.217.11
15:41:38.469678 arp who-has 172.16.217.2 tell 172.16.217.11
15:41:39.485728 arp who-has 172.16.217.2 tell 172.16.217.11
15:41:40.485439 arp who-has 172.16.217.2 tell 172.16.217.11
If there is any more information I can provide that will help someone help me, just ask.
Tom S.
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