routing between vlans
on layer 3 switch (3com 4900).. I added 3 ip interfaces,one interface defined for each vlan with difrenet subnet. without enabling any routing protocol ,I achieved a communicattion between two pc’s that belong to diferent vlans . is there any internal routing between the ip interfaces on layer3 switches?..and how can I stop it ?
Answer Question
| February 5, 2008 2:04 AM
3Com, Cabling, Cisco, Hardware, Hubs, Networking, Routers, Switches, Tech support
on layer 3 switch (3com 4900).. I added 3 ip interfaces,one interface defined for each vlan with difrenet subnet. without enabling any routing protocol ,I achieved a communicattion between two pc’s that belong to diferent vlans . is there any internal routing between the ip interfaces on layer3 switches?..and how can I stop it ?
Answer Question
| February 5, 2008 2:04 AM
3Com, Cabling, Cisco, Hardware, Hubs, Networking, Routers, Switches, Tech support
Cisco 7606 Vs. the compitition, Foundry XMR series or other.
My company is looking to purchase a new router, we are looking at expanding our cable tv division down the road with video/ video on demand and need to upgrade our current router due to bandwidth constraints, my question is does anyone have a different router good or bad. All answers are welcome and encouraged. [...]
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| December 2, 2005 9:22 AM
Availability, Bandwidth, Budgeting, Business/IT alignment, Cabling, Cisco, DataManagement, Foundry, Hardware, Hubs, Networking, Nortel, Project management, ROI & cost justification, Routers, Storage, Switches, Vendors
My company is looking to purchase a new router, we are looking at expanding our cable tv division down the road with video/ video on demand and need to upgrade our current router due to bandwidth constraints, my question is does anyone have a different router good or bad. All answers are welcome and encouraged. [...]
Answer Question
| December 2, 2005 9:22 AM
Availability, Bandwidth, Budgeting, Business/IT alignment, Cabling, Cisco, DataManagement, Foundry, Hardware, Hubs, Networking, Nortel, Project management, ROI & cost justification, Routers, Storage, Switches, Vendors
VPn solution required for remote IP telephony
We would like to have remote ip telephony connectivity for our office so that it will be helpful for our remote users and our Royal customers to have ip soft phone which will be connected to our network through VPN tunnel to our IP PABX and dial out locally. We are having ADSL modem connectivity [...]
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| November 27, 2005 11:40 AM
Application security, Availability, Cabling, Database, Encryption, Exchange, Firewalls, Forensics, Hardware, Hubs, Incident response, Instant Messaging, Intrusion management, Network security, Networking, Nortel, Routers, Secure Coding, Security, Switches, VoIP, VPN, Wireless
We would like to have remote ip telephony connectivity for our office so that it will be helpful for our remote users and our Royal customers to have ip soft phone which will be connected to our network through VPN tunnel to our IP PABX and dial out locally. We are having ADSL modem connectivity [...]
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| November 27, 2005 11:40 AM
Application security, Availability, Cabling, Database, Encryption, Exchange, Firewalls, Forensics, Hardware, Hubs, Incident response, Instant Messaging, Intrusion management, Network security, Networking, Nortel, Routers, Secure Coding, Security, Switches, VoIP, VPN, Wireless
ARP, Layer 2 Broadcasts, Switches and NICs
How does ARP work with layer 2 broadcasts? What I mean is, if an IP address is not yet in its cache, ARP broadcasts an ARP request in order to discover the corresponding MAC address, right? Does that mean that the hardware address of the Ethernet frame that encapsulates the ARP request is ff:ff:ff:ff:ff:ff? Also, [...]
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| December 6, 2005 9:11 AM
Cabling, Hardware, Hubs, Networking, Routers, Switches
How does ARP work with layer 2 broadcasts? What I mean is, if an IP address is not yet in its cache, ARP broadcasts an ARP request in order to discover the corresponding MAC address, right? Does that mean that the hardware address of the Ethernet frame that encapsulates the ARP request is ff:ff:ff:ff:ff:ff? Also, [...]
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| December 6, 2005 9:11 AM
Cabling, Hardware, Hubs, Networking, Routers, Switches
Setting Up VLAN across WAN link for Testing
I am trying to setup a Vlan via a WAN Link. Local End has already 4 VLANs. Remote End doesn’t. Remote end needs to access VLAN id 4 via the WAN link. Local Gateway router = Cisco 3660 Remote Gateway Router = Cisco 3660 Local Switch = Cisco 3750 Remote Switch = Cisco 2924 What [...]
Answer Question
| December 5, 2005 12:21 AM
Availability, Bandwidth, Cabling, Cisco, Hardware, Hubs, IPv4, Network monitoring, Network protocols, Networking, Performance management, Ping, Routers, Switches, TCP
I am trying to setup a Vlan via a WAN Link. Local End has already 4 VLANs. Remote End doesn’t. Remote end needs to access VLAN id 4 via the WAN link. Local Gateway router = Cisco 3660 Remote Gateway Router = Cisco 3660 Local Switch = Cisco 3750 Remote Switch = Cisco 2924 What [...]
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| December 5, 2005 12:21 AM
Availability, Bandwidth, Cabling, Cisco, Hardware, Hubs, IPv4, Network monitoring, Network protocols, Networking, Performance management, Ping, Routers, Switches, TCP
AOL Spammer IP Identification
Concerning the ever increasing amount of received spam, to battle this I have a program with which I can extract the IP address from the sender for reporting purposes, however, I have been receiving an increasing amount from AOL proxy server for which I cannot aquire the senders IP address. Is there another way I [...]
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| November 20, 2005 11:56 AM
Access control, Active Directory, Application security, Availability, backdoors, Bandwidth, Bind, Biometrics, Browsers, Cabling, Compliance, configuration, CRM, Current threats, Database, DataCenter, Development, DHCP, Digital certificates, Disaster Recovery, DNS, Encryption, Exchange, filtering, Firewalls, Forensics, General Directories, Hacking, Hardware, Hubs, human factors, Identity & Access Management, Incident response, Instant Messaging, Interoperability, Intrusion management, Lotus Domino, Microsoft Windows, Network applications management, Network management software, Network monitoring, Network security, Network testing, Networking, Networking services, patching, PEN testing, Performance management, Ping, Platform Security, Policies, Protocol analysis, provisioning, Remote management, Risk management, Routers, Secure Coding, Security, Security Program Management, Security tokens, Servers, Single sign-on, Software, Spyware, SSL/TLS, Switches, Tech support, Trojans, Viruses, VPN, vulnerability management, Web security, Wireless, worms
Concerning the ever increasing amount of received spam, to battle this I have a program with which I can extract the IP address from the sender for reporting purposes, however, I have been receiving an increasing amount from AOL proxy server for which I cannot aquire the senders IP address. Is there another way I [...]
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| November 20, 2005 11:56 AM
Access control, Active Directory, Application security, Availability, backdoors, Bandwidth, Bind, Biometrics, Browsers, Cabling, Compliance, configuration, CRM, Current threats, Database, DataCenter, Development, DHCP, Digital certificates, Disaster Recovery, DNS, Encryption, Exchange, filtering, Firewalls, Forensics, General Directories, Hacking, Hardware, Hubs, human factors, Identity & Access Management, Incident response, Instant Messaging, Interoperability, Intrusion management, Lotus Domino, Microsoft Windows, Network applications management, Network management software, Network monitoring, Network security, Network testing, Networking, Networking services, patching, PEN testing, Performance management, Ping, Platform Security, Policies, Protocol analysis, provisioning, Remote management, Risk management, Routers, Secure Coding, Security, Security Program Management, Security tokens, Servers, Single sign-on, Software, Spyware, SSL/TLS, Switches, Tech support, Trojans, Viruses, VPN, vulnerability management, Web security, Wireless, worms
Stop bit problem: USB to Serial Converter attached to motion controller, unable to set for 7-E-2
I have three different USB to Serial converters, one of them an isolated converter from B&B. One brand of motion controller I work on uses EVEN parity / 7 data bits / 2 stop bits as its default. I find that none of my converters will work on the controller in this configuration. If I [...]
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| November 22, 2005 5:36 PM
3Com, Active Directory, ActiveX, Administration, Apache, Automated, Availability, BASIC, Benchmarking, Business Objects, C, Cabling, Cape Clear Cape Connect, Career development, Cisco, Clustering, Cognos, Crystal Reports, Data analysis, Data Junction, Data management and storage, Data mining/analysis, Data warehousing applications, Database, DataCenter, DB2, Dell, Desktop management applications, Desktops, Development, DHCP, Distribution/logistics applications, DNS, Enterprise Desktop, Ethernet, Fault isolation, Fax and print management, FDDI, File, Frame Relay, Functional, H.323, Hardware, Hardware selection and management, Hewlett-Packard, Hewlett-Packard Application Server, Hubs, Hyperion, IBM, Informatica, Information Builders, Interoperability, Lifecycle development, Linux, Lotus Domino, Management, Manufacturing applications, Microprocessors, Microsoft Systems Management Server, Microsoft Windows, Migrations and upgrades, Monitoring, NCR, NCR/Teradata, Network applications management, Network connectivity, Network management software, Network monitoring, Network protocols, Network testing, Networking, Networking services, NIC, Novell IPX/SPX, Oracle, OS, Performance and availability, Performance management, Performance/Load, Ping, Power management, Printers, Programming Languages, Protocol analysis, Remote management, Routers, SAP, SAS Institute, Security, Servers, Software, Software testing, Software testing tools, SPSS, SQL Server, standards, Storage, Switches, Systems management software, TCP, Tech support, Thermal controls
I have three different USB to Serial converters, one of them an isolated converter from B&B. One brand of motion controller I work on uses EVEN parity / 7 data bits / 2 stop bits as its default. I find that none of my converters will work on the controller in this configuration. If I [...]
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| November 22, 2005 5:36 PM
3Com, Active Directory, ActiveX, Administration, Apache, Automated, Availability, BASIC, Benchmarking, Business Objects, C, Cabling, Cape Clear Cape Connect, Career development, Cisco, Clustering, Cognos, Crystal Reports, Data analysis, Data Junction, Data management and storage, Data mining/analysis, Data warehousing applications, Database, DataCenter, DB2, Dell, Desktop management applications, Desktops, Development, DHCP, Distribution/logistics applications, DNS, Enterprise Desktop, Ethernet, Fault isolation, Fax and print management, FDDI, File, Frame Relay, Functional, H.323, Hardware, Hardware selection and management, Hewlett-Packard, Hewlett-Packard Application Server, Hubs, Hyperion, IBM, Informatica, Information Builders, Interoperability, Lifecycle development, Linux, Lotus Domino, Management, Manufacturing applications, Microprocessors, Microsoft Systems Management Server, Microsoft Windows, Migrations and upgrades, Monitoring, NCR, NCR/Teradata, Network applications management, Network connectivity, Network management software, Network monitoring, Network protocols, Network testing, Networking, Networking services, NIC, Novell IPX/SPX, Oracle, OS, Performance and availability, Performance management, Performance/Load, Ping, Power management, Printers, Programming Languages, Protocol analysis, Remote management, Routers, SAP, SAS Institute, Security, Servers, Software, Software testing, Software testing tools, SPSS, SQL Server, standards, Storage, Switches, Systems management software, TCP, Tech support, Thermal controls
Upgrade step from win nt and win 2000 to win 2003
I have windowsNT and window 2000 servers with active directory which i want to upgrade to windows 2003,all servers meet requirement for new vesion.Now can same help me on how to upgrade?what steps should i take
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| November 14, 2005 2:16 AM
3Com, Access, Active Directory, Apache, ATG Dynamo, Availability, Avaya, Bandwidth, BEA WebLogic, Billing and customer care, Billing Support Systems, Bind, BlackBerry, Cabling, Cape Clear Cape Connect, Career development, Certifications, Cisco, DataCenter, Desktops, Development, DHCP, DNS, Ethernet, FDDI, Frame Relay, General Directories, H.323, Handheld, Hardware, Hewlett-Packard Application Server, Hubs, IPv4, IPv6, LDAP, Lotus Domino, Management, Microprocessors, Microsoft .NET, Microsoft Office, Microsoft Windows, MPLS, NetBIOS, Network monitoring, Network protocols, Networking, Networking services, NFS, NIC, Novell IPX/SPX, Novell NDS, OS, Palm OS, Patch management, Performance management, Ping, Printers, Routers, Security, Servers, SIP, SQL Server, Switches, Symbian, TCP, Training, Windows Mobile, WINS
I have windowsNT and window 2000 servers with active directory which i want to upgrade to windows 2003,all servers meet requirement for new vesion.Now can same help me on how to upgrade?what steps should i take
Answer Question
| November 14, 2005 2:16 AM
3Com, Access, Active Directory, Apache, ATG Dynamo, Availability, Avaya, Bandwidth, BEA WebLogic, Billing and customer care, Billing Support Systems, Bind, BlackBerry, Cabling, Cape Clear Cape Connect, Career development, Certifications, Cisco, DataCenter, Desktops, Development, DHCP, DNS, Ethernet, FDDI, Frame Relay, General Directories, H.323, Handheld, Hardware, Hewlett-Packard Application Server, Hubs, IPv4, IPv6, LDAP, Lotus Domino, Management, Microprocessors, Microsoft .NET, Microsoft Office, Microsoft Windows, MPLS, NetBIOS, Network monitoring, Network protocols, Networking, Networking services, NFS, NIC, Novell IPX/SPX, Novell NDS, OS, Palm OS, Patch management, Performance management, Ping, Printers, Routers, Security, Servers, SIP, SQL Server, Switches, Symbian, TCP, Training, Windows Mobile, WINS
RTMCONSOLE on HMC/AS400 I-SERIES 520
Hi All, I am using a software called HALCYON on a multi partitioned I-SERIES controlled by a Hardware Management Console. The full system saves are scheduled using the Halcyon job scheduler. This scheduler does not kick off the backup unless the consoles are signed on to RTMCONSOLE( Restricted Task Manager )and then put on screensaver. [...]
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| November 11, 2005 11:21 PM
AS/400, Hardware, Linux, Routers
Hi All, I am using a software called HALCYON on a multi partitioned I-SERIES controlled by a Hardware Management Console. The full system saves are scheduled using the Halcyon job scheduler. This scheduler does not kick off the backup unless the consoles are signed on to RTMCONSOLE( Restricted Task Manager )and then put on screensaver. [...]
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| November 11, 2005 11:21 PM
AS/400, Hardware, Linux, Routers
layer 2 & layer 3 switch
Hi All, what is the basic difference between layer 2 & layer 3 switch. how can configure layer 2 & layer3 managable switch
Answer Question
| November 10, 2005 6:50 AM
Access control, Application security, Availability, backdoors, Bandwidth, Biometrics, Browsers, Cabling, Cisco, Compliance, configuration, CRM, Current threats, Database, Digital certificates, Disaster Recovery, E-business, Encryption, Exchange, Exchange security, filtering, Firewalls, Forensics, Hacking, Hardware, Hubs, human factors, Identity & Access Management, Incident response, Instant Messaging, Interoperability, Intrusion management, Network monitoring, Network protocols, Network security, Networking, patching, PEN testing, Performance management, Ping, Platform Security, Policies, provisioning, Risk management, Routers, Secure Coding, Security, Security Program Management, Security tokens, Servers, Single sign-on, Software, Spyware, SSL/TLS, Switches, Tech support, Trojans, Viruses, VoIP, VPN, vulnerability management, Web security, Wireless, worms
Hi All, what is the basic difference between layer 2 & layer 3 switch. how can configure layer 2 & layer3 managable switch
Answer Question
| November 10, 2005 6:50 AM
Access control, Application security, Availability, backdoors, Bandwidth, Biometrics, Browsers, Cabling, Cisco, Compliance, configuration, CRM, Current threats, Database, Digital certificates, Disaster Recovery, E-business, Encryption, Exchange, Exchange security, filtering, Firewalls, Forensics, Hacking, Hardware, Hubs, human factors, Identity & Access Management, Incident response, Instant Messaging, Interoperability, Intrusion management, Network monitoring, Network protocols, Network security, Networking, patching, PEN testing, Performance management, Ping, Platform Security, Policies, provisioning, Risk management, Routers, Secure Coding, Security, Security Program Management, Security tokens, Servers, Single sign-on, Software, Spyware, SSL/TLS, Switches, Tech support, Trojans, Viruses, VoIP, VPN, vulnerability management, Web security, Wireless, worms
Error opening tftp cisconet.cfg (Timed out): iocrouter-confg (Timed out)
My 1751 V Router seems to be in an endless loop during the boot-up process an I get the following errors. How do I breake out of this. I have tried Ctrl-Break during the decompression of the .cfg but the router remains in the loop. I Just would like to get it back to the [...]
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| March 29, 2012 8:31 AM
Routers
My 1751 V Router seems to be in an endless loop during the boot-up process an I get the following errors. How do I breake out of this. I have tried Ctrl-Break during the decompression of the .cfg but the router remains in the loop. I Just would like to get it back to the [...]
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| March 29, 2012 8:31 AM
Routers
Cisco 1751 V Router
My 1751 V Router seems to be in an endless loop during the boot-up process an I get the following errors. How do I breake out of this. I have tried Ctrl-Break during the decompression of the .cfg but the router remains in the loop. I Just would like to get it back to the [...]
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| November 28, 2007 3:12 PM
Cisco, Routers
My 1751 V Router seems to be in an endless loop during the boot-up process an I get the following errors. How do I breake out of this. I have tried Ctrl-Break during the decompression of the .cfg but the router remains in the loop. I Just would like to get it back to the [...]
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| November 28, 2007 3:12 PM
Cisco, Routers
RIP Timers
Dear all, I am confused on RIP timers. Especially, Hold-Down timer. Can someone de-brief me with an example sceanrio that how each timer in RIP behaves and the co-relate with each other?
Answer Question
| November 6, 2005 3:38 AM
Cabling, Cisco, Hardware, Hubs, IPv4, Routers, Switches
Dear all, I am confused on RIP timers. Especially, Hold-Down timer. Can someone de-brief me with an example sceanrio that how each timer in RIP behaves and the co-relate with each other?
Answer Question
| November 6, 2005 3:38 AM
Cabling, Cisco, Hardware, Hubs, IPv4, Routers, Switches
Problem with Cisco Static nat rules
Hi you guys, We are currently in the process to replace our firewall with a Cisco pix 515. I?ve set it up in a testing environment in order to make a replica of the network so I can test everything. The way the network is setup right now we use NAT to translate the internet [...]
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| November 3, 2005 5:16 AM
Cabling, Cisco, Hardware, Hubs, Routers, Switches
Hi you guys, We are currently in the process to replace our firewall with a Cisco pix 515. I?ve set it up in a testing environment in order to make a replica of the network so I can test everything. The way the network is setup right now we use NAT to translate the internet [...]
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| November 3, 2005 5:16 AM
Cabling, Cisco, Hardware, Hubs, Routers, Switches
Trunking (router + vlan) and security
We have a switch with two VLAN. One VLAN is on the firewall/Internet side, the other VLAN is on the LAN side. The switch is connected to a router, like this http://www.cisco.com/warp/public/473/50a.jpg The router is connected to an MPLS cloud through another router. The job of the router is to route the traffic from/to the [...]
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| October 28, 2005 5:53 AM
Cabling, Cisco, Firewalls, Forensics, Hardware, Hubs, Incident response, Intrusion management, Network security, Networking, Routers, Security, Switches, VPN, Wireless
We have a switch with two VLAN. One VLAN is on the firewall/Internet side, the other VLAN is on the LAN side. The switch is connected to a router, like this http://www.cisco.com/warp/public/473/50a.jpg The router is connected to an MPLS cloud through another router. The job of the router is to route the traffic from/to the [...]
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| October 28, 2005 5:53 AM
Cabling, Cisco, Firewalls, Forensics, Hardware, Hubs, Incident response, Intrusion management, Network security, Networking, Routers, Security, Switches, VPN, Wireless
Will we really save money having users shut down computers at end of day?
The article below caught my attention. It says that 217 million dollars a year is wasted just in the UK alone by employees leaving computers on overnight. I never shut mine down…my old mentor thought it was actually harmful. Needless to say, we don’t have a policy about shutting down computers here at the end [...]
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| April 19, 2010 12:21 AM
Budgeting, Business/IT alignment, Cabling, DataCenter, Desktops, Hardware, Hubs, Management, Microsoft Windows, Networking, OS, Power management, ROI & cost justification, Routers, Security, Servers, SQL Server, Switches, Tech support
The article below caught my attention. It says that 217 million dollars a year is wasted just in the UK alone by employees leaving computers on overnight. I never shut mine down…my old mentor thought it was actually harmful. Needless to say, we don’t have a policy about shutting down computers here at the end [...]
Answer Question
| April 19, 2010 12:21 AM
Budgeting, Business/IT alignment, Cabling, DataCenter, Desktops, Hardware, Hubs, Management, Microsoft Windows, Networking, OS, Power management, ROI & cost justification, Routers, Security, Servers, SQL Server, Switches, Tech support
NTP not functioning – Segmented Management VLAN
I’m configuring a building wide network of layer2 and layer3 ciscos to use NTP but I’m not getting ntp updates from the ntp servers. Drawing a picture of this would have a Collapsed Core of 2 4500s and 2950 Access switches are 2950s setup based on Cisco’s typical building block network diagram. The only deviation [...]
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| October 25, 2005 10:25 PM
Cabling, Cisco, Hardware, Hubs, Network protocols, Routers, Switches, TCP
I’m configuring a building wide network of layer2 and layer3 ciscos to use NTP but I’m not getting ntp updates from the ntp servers. Drawing a picture of this would have a Collapsed Core of 2 4500s and 2950 Access switches are 2950s setup based on Cisco’s typical building block network diagram. The only deviation [...]
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| October 25, 2005 10:25 PM
Cabling, Cisco, Hardware, Hubs, Network protocols, Routers, Switches, TCP
simple remote administration
hey y’all… is there a way to do the following remotely? change passwords create a share on a server hard drive I have the adminpak installed on my workstation which allows me to do it. I want to be able to do it from ANY computer on the network. I have Win2k3 servers only, and [...]
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| November 26, 2007 10:41 AM
Active Directory, Biometrics, Cabling, DataCenter, Desktops, Development, DHCP, Digital certificates, DNS, Ethernet, Hardware, Help Desk, Hubs, Identity & Access Management, LDAP, Management, Microsoft Office, Microsoft Windows, Network management software, Network protocols, Networking, Networking services, OS, provisioning, Remote management, Routers, Security, Security tokens, Servers, Single sign-on, SQL Server, Switches
hey y’all… is there a way to do the following remotely? change passwords create a share on a server hard drive I have the adminpak installed on my workstation which allows me to do it. I want to be able to do it from ANY computer on the network. I have Win2k3 servers only, and [...]
Answer Question
| November 26, 2007 10:41 AM
Active Directory, Biometrics, Cabling, DataCenter, Desktops, Development, DHCP, Digital certificates, DNS, Ethernet, Hardware, Help Desk, Hubs, Identity & Access Management, LDAP, Management, Microsoft Office, Microsoft Windows, Network management software, Network protocols, Networking, Networking services, OS, provisioning, Remote management, Routers, Security, Security tokens, Servers, Single sign-on, SQL Server, Switches
Unix script to auto-login to Router and ping remote terminals
On unix box, how can I create a script that will do the following: 1. Automatically login to a Nortel BLN router. 2. Ping to about 5 remote terminals to confirm the WAN connectivity where the 5 terminals are located. 3. Ping result to be pipe to a file in the unix box.
Answer Question
| November 2, 2005 7:29 AM
Programming Languages, Remote management, Routers
On unix box, how can I create a script that will do the following: 1. Automatically login to a Nortel BLN router. 2. Ping to about 5 remote terminals to confirm the WAN connectivity where the 5 terminals are located. 3. Ping result to be pipe to a file in the unix box.
Answer Question
| November 2, 2005 7:29 AM
Programming Languages, Remote management, Routers
Wiring/Krone connectors
Forwarding question: What are the implications of connecting 2 wire copper test equipment to the permanent wiring side of Krone connectors over the top of existing wires? My belief is that it can cause noise by spreading the blades to far apart. Is there an alternative connector that can be used for testing purposes that [...]
Answer Question
| October 18, 2005 6:56 AM
Cabling, Hardware, Hubs, Routers, Switches
Forwarding question: What are the implications of connecting 2 wire copper test equipment to the permanent wiring side of Krone connectors over the top of existing wires? My belief is that it can cause noise by spreading the blades to far apart. Is there an alternative connector that can be used for testing purposes that [...]
Answer Question
| October 18, 2005 6:56 AM
Cabling, Hardware, Hubs, Routers, Switches
