How to identify router model using SNMP

Hi Folks

I did the following snmpwalk on a cisco 501 and got the data back listed. There's nothing in there that tells me whether its a model 501 or a 506 etc etc., are there further mibs or some other way of identifying what the router model is ?

thanks


SNMPv2-MIB::sysDescr.0 = STRING: Cisco PIX Firewall Version 6.3(3)

SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.9.1.417
SNMPv2-MIB::sysUpTime.0 = Timeticks: (837509900) 96 days, 22:24:59.00
SNMPv2-MIB::sysContact.0 = STRING:
SNMPv2-MIB::sysName.0 = STRING: pixfirewall
SNMPv2-MIB::sysLocation.0 = STRING:
SNMPv2-MIB::sysServices.0 = INTEGER: 4
IF-MIB::ifNumber.0 = INTEGER: 2
IF-MIB::ifIndex.1 = INTEGER: 1
IF-MIB::ifIndex.2 = INTEGER: 2
IF-MIB::ifDescr.1 = STRING: PIX Firewall 'outside' interface
IF-MIB::ifDescr.2 = STRING: PIX Firewall 'inside' interface
IF-MIB::ifType.1 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifMtu.1 = INTEGER: 1500
IF-MIB::ifMtu.2 = INTEGER: 1500
IF-MIB::ifSpeed.1 = Gauge32: 100000000
IF-MIB::ifSpeed.2 = Gauge32: 100000000
IF-MIB::ifPhysAddress.1 = STRING: 0:12:43:49:5c:bf
IF-MIB::ifPhysAddress.2 = STRING: 0:12:43:49:5c:c0
IF-MIB::ifAdminStatus.1 = INTEGER: up(1)
IF-MIB::ifAdminStatus.2 = INTEGER: up(1)
IF-MIB::ifOperStatus.1 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: up(1)
IF-MIB::ifLastChange.1 = Timeticks: (596242600) 69 days, 0:13:46.00
IF-MIB::ifLastChange.2 = Timeticks: (0) 0:00:00.00
IF-MIB::ifInOctets.1 = Counter32: 2886377388
IF-MIB::ifInOctets.2 = Counter32: 2965544066
IF-MIB::ifInUcastPkts.1 = Counter32: 13094497
IF-MIB::ifInUcastPkts.2 = Counter32: 9944662
IF-MIB::ifInNUcastPkts.1 = Counter32: 70900
IF-MIB::ifInNUcastPkts.2 = Counter32: 7329488
IF-MIB::ifInDiscards.1 = Counter32: 0
IF-MIB::ifInDiscards.2 = Counter32: 0
IF-MIB::ifInErrors.1 = Counter32: 0
IF-MIB::ifInErrors.2 = Counter32: 0
IF-MIB::ifInUnknownProtos.1 = Counter32: 0
IF-MIB::ifInUnknownProtos.2 = Counter32: 837510
IF-MIB::ifOutOctets.1 = Counter32: 2241309677
IF-MIB::ifOutOctets.2 = Counter32: 2826125476
IF-MIB::ifOutUcastPkts.1 = Counter32: 9912700
IF-MIB::ifOutUcastPkts.2 = Counter32: 13139378
IF-MIB::ifOutNUcastPkts.1 = Counter32: 0
IF-MIB::ifOutNUcastPkts.2 = Counter32: 0
IF-MIB::ifOutDiscards.1 = Counter32: 0
IF-MIB::ifOutDiscards.2 = Counter32: 0
IF-MIB::ifOutErrors.1 = Counter32: 0
IF-MIB::ifOutErrors.2 = Counter32: 0
IF-MIB::ifOutQLen.1 = Gauge32: 0
IF-MIB::ifOutQLen.2 = Gauge32: 0
IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero
IP-MIB::ipAdEntAddr.192.168.0.174 = IpAddress: 192.168.0.174
IP-MIB::ipAdEntAddr.192.168.1.1 = IpAddress: 192.168.1.1
IP-MIB::ipAdEntIfIndex.192.168.0.174 = INTEGER: 1
IP-MIB::ipAdEntIfIndex.192.168.1.1 = INTEGER: 2
IP-MIB::ipAdEntNetMask.192.168.0.174 = IpAddress: 255.255.255.0
IP-MIB::ipAdEntNetMask.192.168.1.1 = IpAddress: 255.255.255.0
IP-MIB::ipAdEntBcastAddr.192.168.0.174 = INTEGER: 0
IP-MIB::ipAdEntBcastAddr.192.168.1.1 = INTEGER: 0
IP-MIB::ipAdEntReasmMaxSize.192.168.0.174 = INTEGER: 65535
IP-MIB::ipAdEntReasmMaxSize.192.168.1.1 = INTEGER: 65535

C:\SNMP\net-snmp\bin>