12.10. STUDY QUESTIONS

  1. Describe some methods of improving bandwidth efficiency when forwarding multicast traffic in VPLS.

  2. Referring to Figure 12.2, assume that router PE3 has learnt all the MAC addresses of the equipment in customer Y's sites. Work out what router PE3's MAC table looks like for customer Y's VPLS.

  3. Referring to Figure 12.13, assume that router A has learnt all the MAC addresses of the routers in customer J's sites. Work out what router A's MAC table looks like for customer J's VPLS.

  4. Describe some of the advantages of using an autodiscovery scheme for VPLS.

  5. Suppose we have a VPLS for which the PEs use BGP signaling and autodiscovery. There are six PEs, which have VE-IDs numbered from 1 to 6 inclusive and there are no multihomed customer sites. Suppose PE1 advertises a label-base of 200 000, a VE block offset of 1 and a VE-block size of 8. Assume that PE1 has VE ID 3. What pseudowire label value is PE1 expecting each remote site to use?

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