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Richard Burts commented on Some questions on vlans/switching/routing in LAN, Switching and Routing 7 hours ago

Am I correct in understanding that port GE25 is where the wireless is connected? And correct in...

Richard Burts commented on devices not able to connect to network in LAN, Switching and Routing 8 hours ago

I appreciate that you have sent me two sets of debug output. But neither of them is showing what we...

Richard Burts commented on devices not able to connect to network in LAN, Switching and Routing 11 hours ago

Thank you for the interface configuration. It does verify that the vlan/subnet should include both...

Richard Burts commented on GRE IP address for the tunnel interface in WAN, Routing and Switching 13 hours ago

If gig0/1 has 192.168.0.1 255.255.0.0 then the router will reject the attempt to put 192.168.100....

Richard Burts commented on The MAC address does not show the port in LAN, Switching and Routing 13 hours ago

There are a couple of possibilities of things that might cause this result. - the arp output...

Richard Burts commented on devices not able to connect to network in LAN, Switching and Routing 13 hours ago

Thanks for the debug information. I am surprised that I do not see any arp activity in the debug...

Richard Burts commented on Cisco 6807 sup2t ip helper address command in LAN, Switching and Routing 13 hours ago

I agree with Reza that I am not aware of a hard limit on the number of helper addresses. If it...

Richard Burts commented on devices not able to connect to network in LAN, Switching and Routing 13 hours ago

Thanks for the debug output. But we need some context to be able to interpret the output. What...

Richard Burts commented on security for username and password in WAN, Routing and Switching 14 hours ago

I understand the question from Santosh a bit differently than Julio does. He is answering the...

Richard Burts commented on GRE IP address for the tunnel interface in WAN, Routing and Switching 14 hours ago

I started to say that yes assigning 192.168.255.100 as the tunnel IP address would be fine. And...

Richard Burts commented on RVS1000 Router, not answering request in Small Business Routers 14 hours ago

Darrin If most devices are static addressing and they are not having problems then it is hard to...

Richard Burts commented on devices not able to connect to network in LAN, Switching and Routing 15 hours ago

I do not think that track is what we want. So I would try debug arp <carriage return> HTH...

Richard Burts commented on Logging buffer size in LAN, Switching and Routing 15 hours ago

The buffer size is in bytes. You can verify this if you want using the command show logging and...

Richard Burts commented on devices not able to connect to network in LAN, Switching and Routing 15 hours ago

I do not believe that either snooping or subblocking is what you want. I do not have access to a...

Richard Burts commented on VLAN tag handling through default routes in LAN, Switching and Routing 16 hours ago

Part of your confusion is that you are mixing layer 2 processes and layer 3 processes. You have...

Richard Burts commented on devices not able to connect to network in LAN, Switching and Routing 16 hours ago

Am I correct in understanding that the VRS devices do get an IP address using DHCP?  So far the...

Richard Burts commented on devices not able to connect to network in LAN, Switching and Routing 1 day ago

Am I correct in understanding the initial post that VRS was not able to get an IP address using...

Richard Burts commented on Some questions on vlans/switching/routing in LAN, Switching and Routing 1 day ago

I have looked through the config and have these comments: - the config of the subinterface/trunked...

Richard Burts commented on Some questions on vlans/switching/routing in LAN, Switching and Routing 1 day ago

OK so you are using the trunk approach. This should work well. If you have configured the...

Richard Burts commented on telnet from cisco router question in LAN, Switching and Routing 1 day ago

Tomislav If you are sure that there were no aliases configured then I wonder if they might have...

Richard Burts commented on serial port in WAN, Routing and Switching 1 day ago

The first part of your question is straight forward - serial port does not have a mac address...

Richard Burts commented on telnet from cisco router question in LAN, Switching and Routing 1 day ago

Tommy I am not sure how that was done but my guess is that they used the alias command to create...

Richard Burts commented on Resubnetting IP Address in LAN, Switching and Routing 2 days ago

I would suggest that there is more than one way to look at this question and its answer. The answer...

Richard Burts commented on telnet from cisco router question in LAN, Switching and Routing 2 days ago

I am not sure that I am correctly understanding your question. Are you saying that in a previous...

Richard Burts commented on static routes configure in WAN, Routing and Switching 2 days ago

While there are some scenarios where the routers can communicate without static routes on both...

Richard Burts commented on RVS1000 Router, not answering request in Small Business Routers 2 days ago

Darrin It is good to know that your router is functioning as the DHCP server. I wonder if the...

Richard Burts commented on EIGRP neighbour with HRSP virtual ip address in WAN, Routing and Switching 2 days ago

Eric I am glad that my suggestions were helpful. Thank you for using the rating system to mark...

Richard Burts commented on EIGRP neighbour with HRSP virtual ip address in WAN, Routing and Switching 2 days ago

Eric The reason we chose to use IPsec on the tunnels is that these were connections from remote to...

Richard Burts commented on Network communication reference model in WAN, Routing and Switching 2 days ago

I found the book Interconnections:Bridges and Routers by Radia Perlman to be very helpful and would...

Richard Burts commented on neigbourship and adjacency in LAN, Switching and Routing 4 days ago

You are correct that OSPF is the only routing protocol that explicitly has a adjacency function....

Richard Burts commented on Network communication reference model in WAN, Routing and Switching 4 days ago

I would not say that the OSI model is obsolete. It is a bit older than the TCP/IP model. But both...

Richard Burts commented on RVS1000 Router, not answering request in Small Business Routers 4 days ago

Darrin Thanks for the details about the models of your equipment. the RVS4000 is not an IOS router...

Richard Burts commented on Can´t access a switch via telnet and SSH in LAN, Switching and Routing 1 week ago

Thanks for posting back to the forum with the update. It is interesting that the problem appears to...

Richard Burts commented on RVS1000 Router, not answering request in Small Business Routers 1 week ago

Depending on how the switch is configured it is quite likely that packet capture on your PC is...

Richard Burts commented on RVS1000 Router, not answering request in Small Business Routers 1 week ago

Darrin Have the suggestions from the forum at Wireshark helped you make progress on this issue? I...

Richard Burts commented on Some questions on vlans/switching/routing in LAN, Switching and Routing 1 week ago

Thank you for posting the config of the ASA. There is lots of detail there and I have looked at the...

Richard Burts commented on EIGRP neighbour with HRSP virtual ip address in WAN, Routing and Switching 1 week ago

Eric Thank you for the additional explanation. Could you tell me a bit more about how the remote...

Richard Burts commented on Policy Based routing on Nexus 5000 in WAN, Routing and Switching 1 week ago

It does appear that PBR on Nexus is a bit more restricted that it is on IOS devices. The strategy...

Richard Burts commented on Need help with Vlan tagging in WAN, Routing and Switching 1 week ago

Rokas Thanks for explaining that you were asked to set up vlan on the PC. I still do not...

Richard Burts commented on EIGRP neighbour with HRSP virtual ip address in WAN, Routing and Switching 1 week ago

Eric It is true that you can not use the virtual IP address of HSRP for establishing EIGRP...

Richard Burts commented on I deleted the ios accidentally, now 1841 router is in rommon> mode,please Help !!!!! in WAN, Routing and Switching 1 week ago

Motiar Thanks for posting back to the forum to let us know that you have resolved your problem...

Richard Burts commented on I deleted the ios accidentally, now 1841 router is in rommon> mode,please Help !!!!! in WAN, Routing and Switching 1 week ago

Motiar I agree with Leo that knowing the exact error message would be helpful. In addition here...

Richard Burts commented on Policy Based routing on Nexus 5000 in WAN, Routing and Switching 1 week ago

You have not provided much detail for us to work with. But based on what you have told us so far...

Richard Burts commented on Can't get inter vlan routing to work in LAN, Switching and Routing 1 week ago

It is interesting (and very good news) that now the ping to the gateway address of the other vlan...

Richard Burts commented on VLAN line protocol is down in LAN, Switching and Routing 1 week ago

I am not clear in the original post whether the problem is with the layer 2 vlan or is with the...

Richard Burts commented on Need help with Vlan tagging in WAN, Routing and Switching 1 week ago

Rokas Now I am a bit confused. The discussion up to this point has been about a 3750 switch and a...

Richard Burts commented on Can't get inter vlan routing to work in LAN, Switching and Routing 1 week ago

Thanks for running the debug and posting the output. Unfortunately it does not show what we need to...

Richard Burts commented on Can't get inter vlan routing to work in LAN, Switching and Routing 1 week ago

Thank you for the additional information. The results of tracert are particularly interesting. They...

Richard Burts commented on Some questions on vlans/switching/routing in LAN, Switching and Routing 1 week ago

It will be easier to advise you about issues if you would post the config. But based on what you...

Richard Burts commented on OSPF problems by tunnel GRE in WAN, Routing and Switching 1 week ago

I am glad that my suggestion did lead you to the solution of the problem. I would also like to...

Bio

I have worked with Cisco equipment for 20 years. I've designed and supported small to large networks, as well as taught many Cisco courses. (I'm CCSI #94069 and originally certified in 1994). My background is primarily Route and Switch and my interests include security and VPN technology.
Originally, I started reading and posting to network forums as
one mechanism to help me ramp up for my CCIE certification (#4615 which I earned in 1999). Now I use the forums to help keep me sharp in various technical areas as well as to help others. I like contributing, and I find I can answer
a bunch of the questions quickly. For the 'harder' questions,
I personally get a great deal of satisfaction from digging into
topics that I haven't refreshed on for awhile.
I really enjoy working for Chesapeake Netcraftsmen, they are a
great group of fun and smart people (including 10 CCIEs).
We have consulting and training expertise in high-end routing
and design, switching, VoIP, QoS, MPLS, network management,
security, IP multicast, course and lab development, and other
areas.

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