Troubleshoot: VMware VirtualCenter Server service cannot start automatically and manually

Problem An user forgot the domain user password for SQL and Vcenter server; reset the password of the domain users. Unable to login to vcenter server with vsphere client, vsphere client said connection fail despite correct domain user credential was used to login. Finding the clues to the cause 1. From vcenter server (vc.cyruslab.local), two … Continue reading Troubleshoot: VMware VirtualCenter Server service cannot start automatically and manually

Tshoot: High CPU utilization while flexlink and multicast were operating.

Equipments and tools 1. Windows 2003 server with Orion NPM installed. For traffic and network health monitoring. 2. Windows XP with VLC media player version 0.8.6c, this is the video server. 3. Windows 7 with VLC media player version 0.8.6c, this is the video client. 4. One WS-3560-24TS-E, Catalyst switch that has flexlink feature. 5. … Continue reading Tshoot: High CPU utilization while flexlink and multicast were operating.

Tshoot: A network was not shown in OSPFv3 routing table

Reference topology Refer to IPv6 Layer 3 topology. Reference explanation. While I was doing IPv6 redistribution from ripng to OSPFv3, I found that OSPFv3 routing table did not include the 2026::2:/122 network which is in the RIPng domain between DSW1 and R4. DSW1 however has all the RIPng external routes but cannot ping to 2026::1:/122 … Continue reading Tshoot: A network was not shown in OSPFv3 routing table

Tshoot preparation: OSPFv3 on Area 0

R2 interface Serial0/1/0.23 point-to-point ip address 10.1.1.5 255.255.255.252 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ipv6 address 2026::1:1/122 ipv6 ospf 1 area 0 frame-relay interface-dlci 203 end R3 interface Serial0/0.23 point-to-point ip address 10.1.1.6 255.255.255.252 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ipv6 address 2026::1:2/122 ipv6 enable ipv6 ospf … Continue reading Tshoot preparation: OSPFv3 on Area 0

Tshoot preparation: OSPFv3 on Area 12

R1 interface Serial0/1/0.12 point-to-point bandwidth 128 ip address 10.1.1.1 255.255.255.252 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ipv6 address 2026::12:1/122 ipv6 enable ipv6 ospf 1 area 12 frame-relay interface-dlci 102 end R2 interface Serial0/1/0.12 point-to-point bandwidth 128 ip address 10.1.1.2 255.255.255.252 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ipv6 … Continue reading Tshoot preparation: OSPFv3 on Area 12