label space造句

• It is regard that mpls, as a technology of next generation backbone net, do not support multicast enough when it is advaced . thus there are some limits when use multicast in mpls net, such as limited label space, no merging capability, and no time to live decrement
  令人遗憾的是,作为下一代骨干网络的mpls技术,在提出之初并没有充分考虑对组播的支持,因此在mpls网络中应用组播技术存在一些问题,如有限的标签空间、第2层与第3层合并、ttl值的递减等。