H3C Technologies H3C MSR 20-2X[40] - Manual (Page 39)

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Figure 27 Slot arrangement on the MSR 20-40
(1) Slot 1 (2) Slot 2 (3) Slot 3
(4) Slot 4
Interface numbering
The MSR 20 Router interface adopts “two dimension” numbering rules, shown in the following:
• The interfaces are represented by interface-type X/Y, where interface-type can be serial,
asynchronous, or Ethernet, and so on; X specifies the slot number; Y specifies the interface number.
• Fixed interfaces are on Slot 0.
• Different interfaces on an interface module share the same slot number X.
• For every interface, Y starts from 0 and Y indicates the interface sequence on the interface module,
from left to right.
If you install an SIC-1FEA and an SIC-4FSW respectively in SLOT1 and SLOT2 on the AR MSR 20-20, the
Ethernet interfaces are numbered as follows:
• Fixed Ethernet interfaces are Ethernet 0/0 and Ethernet 0/1;
• The Ethernet interface on the SIC-1FE is Ethernet 1/0;
• The Ethernet interfaces on the SIC-4FSW module are Ethernet 2/0, Ethernet 2/1, Ethernet 2/2 and
Ethernet 2/3.