Zte ZXR10 5900 Product Description page 55

 Support fundamental L2 protocols, including 802.1D STP protocol, 802.1P priority
control, related functions of 802.1Q VLAN, and 802.3ad link aggregation
 Support IPv4 protocol stacks and basic routing protocols
Support higher layer services, e.g. ACL and DHCP

Support partial broadband access functions

Implement Agent function of network management protocol SNMPv3

Allow users to perform network management via serial terminal, Telnet, or SNMP

Manager for tasks including network configuration management, fault management,
performance management and security management
 Smooth software upgrade, with on-line upgrade of the active/standby protocol
processing cards, switching modules and network modules
 Support various network security features
Based on the system functions mentioned above, the system software can be

classified into five subsystems.
Operation support subsystem, including software modules such as BSP, ROS,

SSP, and VxWorks kernel
MUX subsystem, including data distribution module, statistics and monitoring

module, and hardware driver software module. The data distribution module
distributes data packets to the hardware driver(s) and upper-layer software. The
statistics and monitoring module is responsible for forwarding data statistics and
performs monitoring on the hardware driver(s) and software table(s) etc.
 L2 sub-system, including STP protocol, LACP protocol, IGMP SNOOPING protocol,
MAC address management, VLAN management and L2 data forwarding.
L3 subsystem, which implements basic protocols of TCP/IP such as IP, ARP, ICMP,

TCP and UDP, and application protocols such as FTP and Telnet, and implements
unicast and multicast routing protocols, and performs L3 data forwarding.
 Network management, operation & maintenance subsystem, which implements the
Agent function of the SNMP network management protocol, which supports
command line management, and provides operation & maintenance interfaces, and
also provides MIB information.
4.3.1.1 Operation Support Subsystem
The operation support subsystem drives and performs encapsulation for the bottom-
layer hardware, and provides support for other software systems on the upper layer. This
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ZXR10 5900 5200 Product Description
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