Hi Praveen,
Yes you can configure ip pools and assign ip-addreses dynamically for vpn clients.
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[edit access]
user@srx-1# show address-assignment
pool dynamic-pool{
family inet{
network 10.10.10.0/24;
range dynamic-range{
low 10.10.10.129;
high 10.10.10.254;
}
xauth-attributes{
primary-dns 4.2.2.2/32;
}..
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BTW are you using Junos Pulse as VPN client?
Note: If this answers your question, you could mark this as accepted solution that way it benefits others as well. Kudos will be cool if I earned it!
Regards,
Raveen