[Xen-users] No net connectivity on Xen321 + Centos52 ?

["Wil Decius" <wilson.decius@xxxxxxxxx>]

I run Centos 5.2

 uname -rm
  2.6.18-92.1.6.el5 x86_64

On boot, Ethernet is

 ifconfig
  ...
  eth0      Link encap:Ethernet  HWaddr 00:0E:0C:C1:18:1D
            inet addr:192.168.1.9  Bcast:192.168.1.955  Mask:255.255.255.0
            UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
  ...

Net access to & from the box is fully functional.

I 've installed kernel-xen and upgraded to Xen 3.2.1

 rpm -qa xen\* kernel-xen
  kernel-xen-2.6.18-92.1.6.el5
  xen-debuginfo-3.2.1-0xs
  xen-devel-3.2.1-0xs
  xen-libs-3.2.1-0xs
  xen-3.2.1-0xs

/boot/grub/grub.conf contains

 title XenCentOS (2.6.18-92.1.6.el5xen)
  root (hd0,0)
  kernel /xen.gz-3.2 dom0_mem=1024M selinux=0 noirqdebug irq=poll
  module /vmlinuz-2.6.18-92.1.6.el5xen ro root=/dev/VG0/LV0
  module /initrd-2.6.18-92.1.6.el5xen.img

Boot to 'XenCentOS' is OK

 uname -rm
  2.6.18-92.1.6.el5xen x86_64

At this point, I've lost all Net access; Can't ping or ssh to/from the box.

I've edited

 cat /etc/xen/xend-config.sxp
  ...
  #(network-script network-bridge)
  (network-script network-bridge-custom)
  #(vif-script vif-bridge)

 cat /etc/xen/scripts/network-bridge-custom
  #!/bin/sh
  dir=$(dirname "$0")
  "$dir/network-bridge" "$@" vifnum=0 bridge=bridge00 netdev=eth0
  "$dir/vif-bridge"          vifnum=0 bridge=bridge00 netdev=eth0
  ip link set bridge00 up
  route -A inet add default gw 192.168.1.9 dev bridge00

and network state looks OK

 ifconfig
 peth0     Link encap:Ethernet  HWaddr 00:0E:0C:C1:18:1D
           UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
           RX packets:91 errors:0 dropped:0 overruns:0 frame:0
           TX packets:105 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:12692 (12.3 KiB)  TX bytes:7548 (7.3 KiB)
           Interrupt:20

 bridge00  Link encap:Ethernet  HWaddr 00:0E:0C:C1:18:1D
           inet addr:192.168.1.9  Bcast:192.168.1.955  Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
           RX packets:16 errors:0 dropped:0 overruns:0 frame:0
           TX packets:33 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:980 (980.0 b)  TX bytes:1386 (1.3 KiB)

 brctl show
  bridge name   bridge id           STP enabled   interfaces
  bridge00      8000.00216352165d   no            peth0

 route -n
  Kernel IP routing table
  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
  192.168.1.9     0.0.0.0         255.255.255.0   U     0      0
 0 bridge00
  0.0.0.0         192.168.1.9     0.0.0.0         UG    0      0
 0 bridge00

Any clues as to why connectivity is down?

Wil

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