Hello,
Usually bugs are more related to the IOS than to hardware or platform.
check the following text:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123relnt/1800/rn1800yh.pdf
Open Caveats - Cisco IOS Release 12.3(8)YH
CSCsa47584
Traceback warning appears during callback on the auxiliary modem.
CSCef43906
Sweeping ping packet drop for back-to-back Fast Ethernet
CSCee34595
IPSec may cause performance degradation when unconfigured. IP CEF performance could be
reduced only if IPSec is configured (and used) and then all the IPSec configuration is subsequently
removed.
CSCeg21014
Router hangs after removing dialer pool-member from interface bri0.
CSCeg17441
Need to support SNMP traps for fan fault and overheating conditions.
CSCef95303
ipv6ftp: Session counts are wrong after generating FTP alert.
CSCeg34833
Three tunnels are displayed when the show ipv6 pim tunnel command is issued.
CSCef60471
pppox address negotiation using IPCP failed in an ipv6 RADIUS access test.
CSCef83035
Occasional ALIGN-3-SPURIOUS, ALIGN-3-TRACE messages are displayed with pings.
5
Not a specialist in these issues though, just adding my 2 cents,
Hope this help a bit,
if it does, please rate this post.
vlad
Always check release documents for the router and IOS you intend to use.