more than one bridge

[Hiisi]

Hi, list!
Is there a way to set up more than one bridged interface having one
physical device? I'm setting up virtual machines and want them to
share the same network with host computer. For one guest machine I
simply created a bridged interface adding line 'BRIDGE=br0' to
/etc/sysconfig/network-scripts/ifcfg-p21p1 (host computer network
interface), then created /etc/sysconfig/network-scripts/ifcfg-br0 with
nececarry configuration. How to create second interface for second
guest machine and so on?
TIA
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Hiisi.
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