At PM 20:00, the hush hour, the forwarding speed of 10GE LPUs of the NE80E in the MAN can forward traffic is only 7.5 Gbit/s. No more traffic can be added and some MAN users feed that loss of ping DNS packets is very serous.
The NE80E is installed with two SFUs, three 10 x GE LPUs, and one 10 GE LPU.
Add one SFU.
Computing formula: 11Gbits/s x 67% = 7.37 Gbits/s (11 Gbit/s is the unidirectional speed of the LPU and a little margin is reserved during the design).
The percent 67% indicates that the router is installed with only two SFUs though three are required. The bidirectional bandwidth of the
If the NE40E/NE80E/NE5000 is installed with only the
When the router fails to provide wire-speed forwarding, check whether the number of SFUs satisfies the requirement or not.