Static Tunnel; Mpls-Te - Zte ZXR10 ZSR V2 Series Product Description


It supports MPLS CoS and mapping of IP packet from ToS domain to MPLS
packet in EXP domain.
3.4.2

Static Tunnel

Static tunnel is the tunnel configured by the administrator manually. It doesn't need to be
triggered by MPLS signaling protocol, nor packet control by exchange. Thus it consumes
little resource and suits stable small network with simple topology structure. However, the
tunnel established by static label distribution cannot be dynamically adjusted based on
network topology change. It should be manually configured by the administrator.
Each LSR on the tunnel should be configured with static tunnel command, including head
node, intermediate node and tail node. The services can be guaranteed to normally
forward on LSP of the tunnel only when the tunnel is correctly configured on each node.
3.4.3

MPLS-TE

Network congestion is a major problem that influences backbone network performance.
The local congestion may result from inadequate network resources or unbalanced
resource load. TE (Traffic Engineering) solves the congestion caused by unbalanced
load.
MPLS TE is a technology combining traffic engineering and MPLS. With MPLS TE, the
service provider can precisely control the path that the traffic goes through, so as to avoid
the congested node. It can solve the problem that some paths are overloaded but some
are idle, so as to make full use of the existing bandwidth resources. At the same time,
MPLS TE can reserve the resources during the process of LSP tunnel establishment to
guarantee service quality.
MPLS TE establish link bandwidth resource database at each node in MPLS network by
OSPF TE or IS-IS. It uses CSPF algorithm to calculate tunnel establishment path based
on link bandwidth resource database and tunnel constraint. At last it uses RSVP-TE
signaling protocol to establish TE tunnel on the path that calculated by CSPF algorithm.
ZXR10 ZSR V2 supports the following MPLS TE features:

OSPF TE and IS-IS TE
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ZXR10 ZSR V2 Series Router Product Description
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