The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] [mpls] Bidirectional RSVP-TE tunnel
Dear members of the mpls distribution list: Virtual router technology provides a easy and flexible procedure to implement L3VPN. But as GRE/IPsec tunnel has no properties such as TE, QoS and fast convergence features, the L3VPN implemented on GRE/IPsec tunnel is not popular with service providers. RSVP-TE is very suitable to provide MPLS VPN service with the requirement of high availability and QoS assurance because it consists of many good features such as TE, QoS and fast convergence. As RSVP-TE tunnel is unidirectional, it can not be used to implement L3VPN through virtual router technology as GRE tunnel. Through the binding of two unidirectional RSVP-TE tunnels established between a pair of LSRs destined to each other, a bidirectional RSVP-TE tunnel is formed. Like GRE/IPsec tunnel, the bidirectional RSVP-TE tunnel can be used to establish L3VPN with virtual router. In contrast to BGP/MPLS VPN defined in [RFC2547bis], multicast is easier to be implemented and multicast traffics can travel in RSVP-TE tunnel with such L3VPN. This L3VPN fully inherits the property of RSVP-TE, such as TE, QoS and fast convergence features. In addition, the bidirectional RSVP-TE tunnel has many other purposes, such as interconnection of two separate routing domains through a RSVP-TE tunnel and implementing LDP over TE. The decision factors of RSVP-TE tunnel binding include tunnel source address, tunnel destination address and binding key. The reason for making binding key as one of the decision factors is that a LSR can setup different RSVP-TE tunnels with the same pair of tunnel source address and tunnel destination address, but these tunnel interfaces must be configured with different binding keys. Any comment is welcomed! Best regards! Steven Joe Huawei Technology Co.,Ltd. xuxh@huawei.com begin:vcard n:;xuxiaohu fn:xuxiaohu version:2.1 email;internet:xuxh@huawei.com end:vcard _______________________________________________ mpls mailing list mpls@lists.ietf.org https://www1.ietf.org/mailman/listinfo/mpls |
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