Interface Numbering
Physical Interface Numbering Rules
Physical interfaces are numbered in the following way:
A single switch uses slot ID/subcard ID/interface ID to identify physical interfaces.
A CSS switch uses chassis ID/slot ID/subcard ID/interface ID to identify physical interfaces.
- Chassis ID: indicates the ID of a switch in the CSS. The value is 1 or 2.
- Slot ID: indicates the number of the slot where a card is located.
- Subcard ID: indicates the ID of a subcard.
- Interface ID: indicates the sequence number of an interface on the card.
- If there is only one row of interfaces on the panel, the interfaces are numbered from left to right, starting with 0.
- If there are two rows of interfaces on the panel, the interfaces are numbered from top to bottom and left to right, starting from 0.
If an LPU has interfaces of different speeds, the interfaces of each speed are numbered separately. For example, an LE1D2S04SX1E card has 10GE and GE interfaces. The 10GE and GE interfaces are both numbered from left to right, starting from 0.
If a card is inserted in slot 3 of a switch, the interface with interface ID 2 (see figures above for interface ID numbering) is numbered 3/0/2. If the switch is in a CSS and the CSS ID is 1, the interface is numbered 1/3/0/4.
100GE optical interfaces and some 40GE optical interfaces can be split into multiple interfaces. For the numbering rules of the split interfaces, refer to the Configuration Guide-Interface Management.