Ok...what need to change was the following: nterface ethernet 1/g1 negotiation 10h 10f 100h 100f 1000f description 'InPath-Riverbed' spanning-tree disable switchport mode general switchport general allowed vlan add 60 tagged and interface ethernet 1/g47 description 'Uplink2PBX' switchport mode general switchport general allowed vlan add 1,60 tagged
Hi,  strange occurrence, the setup is as follows: Router  Cisco 1841 (VLAN's1, 60) -> Riverbed (InPath and Primary interfaces) -> PC6248 -> Ports 47/48 (VLAN's 1 and 60) - > Nortel 325-24T->Server (dual connection. VLAN's 1 and 60) to the Nortel. VLAN 60 is 192.168.192.161/29,  VLAN 1 is 10.5.5.0/24 Now for approximately 4 hours we can connect to all the device in VLAN 60, but after that point they become invisible.  To make matters worst if we put the aging Cisco back everything starts working.  Attached are the configurations for both switches, I am hoping some one can tell me what is actually happening and a way fix this. VLAN 1 always works, on the PC6248/Cisco,  there are PC's and a File/print serverall  on VLAN 1.  The server that is dual connected is a windows server running Call Pilot. All routing is done at the router (Cisco 1841), the network spans the country Dell PowerConnect 6248 Config: !Current Configuration:!System Description "PowerConnect 6248, 3.3.1.10, VxWorks 6.5"!System Software Version 3.3.3.3!Cut-through mode is configured as disabled!configurevlan databasevlan 60exithostname "SWITCH1"sntp unicast client enablesntp client poll timer 1024sntp server 10.1.1.2stackmember 1 2exitip address 10.5.5.3 255.255.255.0ip default-gateway 10.5.5.1no logging consolelogging file debuglogging buffered debuginterface vlan 50name "Voice_1"exitinterface vlan 60name "Voice_2"exitusername "xxxxxxx" password xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx level 15 encryptedspanning-tree priority 4096!interface ethernet 1/g1negotiation 10h 10f 100h 100f 1000fdescription 'InPath-Riverbed'spanning-tree disableswitchport mode generalswitchport general allowed vlan add 60exit!interface ethernet 1/g2negotiation 10h 10f 100h 100f 1000fdescription 'Primary-Riverbed'exit!interface ethernet 1/g3description 'Dell_PowerEdge1'exit!interface ethernet 1/g4description 'Dell_PowerEdge2'exit!interface ethernet 1/g5description 'Dell_PowerEdgeiDRAC'exit!interface ethernet 1/g47description 'Uplink2PBX'switchport mode trunkswitchport trunk allowed vlan add 1,60exit!interface ethernet 1/g48description 'Uplink2Switch-another floor'switchport mode trunkswitchport trunk allowed vlan add 160exit!interface ethernet 1/xg1shutdownexit!interface ethernet 1/xg2shutdownexit!interface ethernet 1/xg3shutdownexit!interface ethernet 1/xg4shutdownexitsnmp-server community xxxxxxx roexit Cisco Config (always works): Current configuration : 3847 bytes!! No configuration change since last restart!version 12.2no service padservice timestamps debug datetime msec localtime show-timezoneservice timestamps log datetime msec localtime show-timezoneservice password-encryption!hostname SWITCH1!boot-start-markerboot-end-marker!logging buffered 40960enable secret 5 !username fujitsu privilege 15 secret 5 username kbwalkeradm privilege 15 secret 5 aaa new-model!!aaa authentication login default localaaa authorization consoleaaa authorization exec default local!!!aaa session-id commonsystem mtu routing 1500ip subnet-zero!spanning-tree mode pvstno spanning-tree optimize bpdu transmissionspanning-tree extend system-id!vlan internal allocation policy ascending!!!interface FastEthernet0/1 description UPLINK2RB and router switchport trunk allowed vlan 1,60 switchport mode trunk!interface FastEthernet0/2!interface FastEthernet0/3!interface FastEthernet0/4!interface FastEthernet0/5!interface FastEthernet0/6!interface FastEthernet0/7!interface FastEthernet0/8!interface FastEthernet0/9!interface FastEthernet0/10!interface FastEthernet0/11!interface FastEthernet0/12!interface FastEthernet0/13!interface FastEthernet0/14!interface FastEthernet0/15!interface FastEthernet0/16!interface FastEthernet0/17!interface FastEthernet0/18!interface FastEthernet0/19!interface FastEthernet0/20!interface FastEthernet0/21!interface FastEthernet0/22!interface FastEthernet0/23!interface FastEthernet0/24!interface FastEthernet0/25!interface FastEthernet0/26!interface FastEthernet0/27!interface FastEthernet0/28!interface FastEthernet0/29!interface FastEthernet0/30!interface FastEthernet0/31!interface FastEthernet0/32!interface FastEthernet0/33!interface FastEthernet0/34!interface FastEthernet0/35!interface FastEthernet0/36!interface FastEthernet0/37!interface FastEthernet0/38!interface FastEthernet0/39!interface FastEthernet0/40!interface FastEthernet0/41!interface FastEthernet0/42!interface FastEthernet0/43!interface FastEthernet0/44!interface FastEthernet0/45!interface FastEthernet0/46!interface FastEthernet0/47!interface FastEthernet0/48 description UPLINK to Teleco Management Switch DOCTG1-S1 switchport trunk native vlan 60 switchport trunk allowed vlan 1,60 switchport mode trunk no cdp enable!interface GigabitEthernet0/1!interface GigabitEthernet0/2!interface Vlan1 ip address 10.5.5.3 255.255.255.0 no ip route-cache!ip default-gateway 10.5.5.1no ip http server!!control-plane!!line con 0 exec-timeout 0 0line vty 0 4 access-class mgmt_in inline vty 5 15 access-class mgmt_in in!ntp clock-period 36028204ntp server 10.4.1.24 preferend
Losing connection to devices on VLAN 60 after 4 hours when using a PowerConnect 
6248