Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
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Chapter 2 Cisco IGX 8400 Series Cards
Universal Router Module
The URM delivers high-density voice interfaces, Fast Ethernet connectivity and ATM switching through
a combination of Cisco IOS software and switch software functionality.
Note Refer to the Compatibility Matrix for Cisco IOS software, switch software, and firmware compatibility
requirements.
The URM consists of a logically-partitioned front card connected to a universal router interface (URI)
back card. The front card contains an embedded UXM-E running an Administration firmware image, and
an embedded router (based on the Cisco 3660 router) running a Cisco IOS image. The embedded
UXM-E and the embedded router connect through a logical internal ATM interface, with capability
equivalent to an OC3 ATM port.
Note Switch software treats this interface as an OC3 ATM port, and this interface is the only port on the
embedded UXM-E that is visible to switch software.
Unlike the Cisco 3660 router, which has one slot for the motherboard and six slots for network modules,
the embedded router has three virtual slots with built-in interfaces (see Table 2-53 and Figure 2-41).
Because the URM front card contains both an embedded UXM-E and an embedded Cisco router, the
front card runs two separate software images with two different download procedures. For the embedded
UXM-E, the administration firmware image is downloaded and saved to the embedded UXM-E Flash
memory through switch software commands (see Cisco WAN Switching Command Reference).
The embedded router runs Cisco IOS software. You can download and save the Cisco IOS image using
standard Cisco IOS procedures as outlined in any documentation supporting the Cisco IOS image being
used on the node.
The embedded UXM-E hardware is based on the UXM-E card for the Cisco IGX series and features
16 MB asynchronous DRAM, 8 MB Flash memory, and 8 KB BRAM. The embedded router hardware
is based on the Cisco 3660 modular-access router and features 8 MB boot Flash SIMM, 32 MB
Cisco IOS Flash SIMM, and 128 KB NVRAM.
Table 2-53 Interfaces on Embedded Router Virtual Slots
Slot Name Description
Slot 0 ATM 0/0 The internal ATM interface connected to the embedded UXM-E
ATM port.
Slot 1 FE1/0 and FE1/1 Fast Ethernet interfaces connected to the Fast Ethernet ports on
the BC-URI-2FE2V and BC-URI-2FE back cards.
Slot 2 T1 2/0 and T1 2/1;
E1 2/0 and E1 2/1
T1 or E1 interfaces connected to the T1 or E1 ports on the VWIC
installed in the back card.
Note Applies to URMs with installed BC-URI-2FE2V back
cards only.