code:
trans.putOperationalData(this.topologyAugment, ta);
LOG.debug("Peer data {} set to {}", this.topologyAugment, ta);

log output:
2014-04-17 03:11:39.264 PDT [nettyThreadgroupModule$NioEventLoopGroupCloseable-6-4] DEBUG o.o.b.p.t.p.AbstractTopologySessionListener - Peer data InstanceIdentifier [path=[org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.t
opology.rev131021.NetworkTopology, org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology[key=TopologyKey [_topologyId=Uri [_value=pcep-topology]]], org.opendaylight.yang.gen.v1.urn.t
bd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node[key=NodeKey [_nodeId=Uri [_value=pcc://39.39.39.39]]], org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.Node1]]

set to

.... ero=Ero [_subobject=[Subobject [_loose=false, _subobjectType=IpPrefixCase [_ipPrefix=IpPrefix [_ipPrefix=IpPrefix [_ipv4Pr
efix=Ipv4Prefix [_value=195.20.160.40/32]], augmentation=[]], augmentation=[]], augmentation=[]], Subobject [_loose=false, _subobjectType=IpPrefixCase [_ipPrefix=IpPrefix [_ipPrefix=IpPrefix [_ipv4Prefix=Ipv4Prefix [_value=201.20.160.43/
32]], augmentation=[]], augmentation=[]], augmentation=[]], Subobject [_loose=false, _subobjectType=IpPrefixCase [_ipPrefix=IpPrefix [_ipPrefix=IpPrefix [_ipv4Prefix=Ipv4Prefix [_value=43.43.43.43/32]], augmentation=[]], augmentation=[]]
, augmentation=[]]], _ignore=false, ....

restconf reports only last ero prefix:

<ero>
<processing-rule>false</processing-rule>
<subobject>
<loose>false</loose>
<ip-prefix><ip-prefix>43.43.43.43/32</ip-prefix></ip-prefix>
</subobject>
<ignore>false</ignore>
</ero>