Starting xen service caused bridging loop and packet storm in RHEL 5
Issue
-
When starting
xen
with(network-script network-bridge)
configured in/etc/xen/xend-config.sxp
AND a bridge manually configured foreth0
via/etc/sysconfig/network-scripts/ifcfg-eth0
, server created a packet storm on the network. -
Looks like a misconfiguration between the OS network bridge and the xen network-script, trigger the box to start acting as a switch, intercepting routing requests.
-
The number of network sessions from a Xen host increased on the firewall as well as the CPU after updating
xen
Environment
- Red Hat Enterprise Linux (RHEL) 5
- Xen virtualization
(network-script network-bridge)
or(network-script network-bridge-bonding)
configured in/etc/xen/xend-config.sxp
- One or more interfaces configured to use a bridge in
/etc/sysconfig/network-scripts/ifcfg-*
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