单项选择题
A.the time it takes to identify the optimal path for the LSP
B.the interval at which the ingress router recalculates the LSP’s path
C.the time the ingress router takes to establish the primary path
D.the maximum number of times the ingress router tries to establish the primary path
单项选择题 Given the following LSP configuration， which statement is true？（） label-switched-pathlsp-xyz { to 10.2000.1.1； primarypath1； secondarypath2； secondarypath3； no-cspf； } pathpath1 { 10.200.10.1 strict； } pathpath2 { 10.200.20.1 strict； } pathpath3 { 10.200.30.1loose }
单项选择题 IntowhichprotocolareLDPhellomessagesencapsulated？（）
单项选择题 Which represents a correct PE-PE BGP configuration for an L3 VPN？（）