7-3
Cisco SCE 8000 10GBE Software Configuration Guide
OL-30621-02
Chapter 7 Configuring Line Interfaces
Line Interfaces
Step 3
At the SCE(config if)# prompt, enter
exit
and press
Enter
.
Exits to global configuration mode, from which you can access a different Ten Gigabit Ethernet
interface.
Changing the Traffic Direction on the Ten Gigabit Ethernet Line Interfaces
The hardware design of the Cisco SCE 8000 10G platform is such that the traffic coming in and out of
SPAs 0 and 2 is limited to a total of 16Gbps in each direction, as is the traffic coming in and out of SPAs
1 and 3. Since by default, in 10GBE installations, SPAs 0 and 2 are subscriber-side ports, and SPAs 1
and 3 are network-side ports, this effectively limits total traffic in each direction (upstream and
downstream) to 16Gbps. Therefore, a site that has a total of more than 16Gbps of traffic in one direction
(upstream or downstream), will exceed this limit and suffer packet loss.
You can use this command to swap the roles of the ports on link 1, which will switch part of the
high-volume traffic to the opposite pair of SPAs and prevent either pair of SPAs from exceeding the
16Gbps limit.
Limitations
•
This command is supported only Link 1 (3/2/0 and 3/3/0). It is not supported on Link 0.
Only one interface on the link is explicitly configured. The corresponding interface is automatically
set to the opposite traffic side.
•
The connection mode must be either inline or receive-only. This command is not supported for
cascade modes.
•
This command can only be executed when no application is loaded, or in shutdown mode.
How to Specify the Traffic Direction on Link 1
Step 1
At the SCE# prompt, enter
configure
and press
Enter
.
Enters Global Configuration mode.
Step 2
At the SCE(config)# prompt, enter
interface TenGigabitEthernet 3/2/0
or
interface
TenGigabitEthernet 3/3/0
and press
Enter
.
Enters Interface Configuration mode for the selected 10 GBE interface.
Step 3
At the SCE(config if)# prompt, enter
traffic-side (subscriber | network
)
and press
Enter
.
The traffic side is set to the specified direction for the interface you are configuring and also
automatically to the opposite direction for the corresponding interface.