Interface Numbering Rules
Management Interface Numbering Rules
The switch supports console and ETH management interfaces on an MPU.
The following table lists the management interface numbers.
Interface |
Number |
|---|---|
Console interface |
console 0 |
ETH interface |
Ethernet 0/0/0 |
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 sequence number: indicates the sequence number of an interface on the card.
For example, if a card is inserted in slot 3 of a switch, the number of the fifth interfaces on the card that numbered from top to bottom and left to right is 3/0/4. If the switch is in a CSS and the CSS ID is 1, the interface is numbered 1/3/0/4.
- There are one row of interfaces on the interface card. The interfaces are numbered from left to right, starting with 0.
- There are two rows of interfaces on the interface card. These interfaces are numbered from top to bottom and left to right, starting from 0.
100GE optical interfaces and some 40GE optical interfaces can be split into multiple interfaces. The converted interfaces are numbered using the following rules:
If a 40GE interface is numbered 40GE x/0/n, the four converted 10GE interfaces are numbered XGE x/1/(4n + z). For example, if a 40GE interface is numbered 40GE1/0/1, the four converted 10GE interfaces are numbered XGE1/1/4, XGE1/1/5, XGE1/1/6, and XGE1/1/7.
If a 40GE interface is numbered 40GE x/1/n, the four converted 10GE interfaces are numbered XGE x/2/(4n + z + 8). For example, if a 40GE interface is numbered 40GE1/1/1, the four converted 10GE interfaces are numbered XGE1/2/12, XGE1/2/13, XGE1/2/14, and XGE1/2/15.
- x: indicates the slot number of the card.
- n: indicates the sequence number of the 40GE interface. The value starts from 0.
- z: indicates the interface location. The value ranges from 0 to 3.
Split interfaces are numbered in the same sequence as the wires of a cable are numbered. For example, in a 1-to-4 cable, the wire numbered 1 corresponds to the interface with the lowest interface number, and the wire numbered 4 corresponds to the interface with the highest interface number.
After 100GE interfaces are split, the subcard number and interface sequence number of converted interfaces are fixed. Table 1-5 describes the numbering rules. For details about how to split and merge, see Configuring Interface Split and Merge.
Table 1-5 Numbering rule for interfaces converted from a 100GE interface100GE Interface Number
Numbers of Converted 40GE Interfaces
(EE Series Cards)
Numbers of Ten Converted 10GE Interfaces
(EE Series Cards)
Numbers of Four Converted 10GE Interfaces
(ES1D2C04HX2E, LSS7C06HX6E0, and ES1D2C04HX2S Cards)
Numbers of Four Converted 10GE Interfaces
(ES1D2H02QX2E and ES1D2H02QX2S Cards)
Numbers of Four Converted 25GE Interfaces
(LSS7C06HX6S0, and LSS7C06HX6E0 Cards)
100GE x/0/0
40GE x/1/0
40GE x/1/1
XGE x/2/0 to XGE x/2/9
XGE x/1/0 to XGE x/1/3
XGE x/2/0 to XGE x/2/3
25GE x/2/0 to 25GE x/2/3
100GE x/0/1
40GE x/1/2
40GE x/1/3
XGE x/2/10 to XGE x/2/19
XGE x/1/4 to XGE x/1/7
XGE x/2/4 to XGE x/2/7
25GE x/2/4 to 25GE x/2/7
100GE x/0/2
-
-
XGE x/1/8 to XGE x/1/11
-
25GE x/2/8 to 25GE x/2/11
100GE x/0/3
-
-
XGE x/1/12 to XGE x/1/15
-
25GE x/2/12 to 25GE x/2/15
Numbering rules for interfaces converted from a 100GE interface in the preceding table are for your reference only. The number of 100GE interfaces supported on cards varies depending on the device.
