Joseph W. Doherty

Member Since: Nov 20, 2009

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Joseph W. Doherty commented on Prevent Unwanted Device (Hub, Wireless Router) Connect To Cisco Switchport in LAN, Switching and Routing 1 day ago

What Reza described is probably the easiest way to restrict the devices that can connect to your...

Joseph W. Doherty commented on Upgrade Sup-2T from ipbase to ipservices in LAN, Switching and Routing 1 day ago

Yes (it can be upgraded to IPServices).

Joseph W. Doherty commented on startup config in WAN, Routing and Switching 1 day ago

Check your config reg and show ver (for up time).  Your config reg may be set to ignore startup and...

Joseph W. Doherty commented on OSPF - Redistribute route tagged in WAN, Routing and Switching 1 day ago

You situation is a bit unclear.  Do you already have OSPF tagged routes with 1000 that you want to...

Joseph W. Doherty commented on Python to issue CLI commands over SSH in Other Network Infrastructure Subjects 1 day ago

From Paramiko's FAQ: Paramiko doesn’t work with my Cisco, Windows or other non-Unix system! In an...

Joseph W. Doherty commented on 10GB Switch in LAN, Switching and Routing 2 days ago

I'm not real knowledgeable about Nexus licensing, but I believe Nexus (as many other Cisco devices...

Joseph W. Doherty commented on 10GB Switch in LAN, Switching and Routing 2 days ago

That's one of many possible paths.  You need to refine your requirements beyond needing 250 10g...

Joseph W. Doherty commented on HSRP in LAN, Switching and Routing 2 days ago

Still sounds like a routing configuration issue, but we would need to check all your routers'...

Joseph W. Doherty commented on HSRP in LAN, Switching and Routing 2 days ago

Is the secondary link up?  For example, from branch 1 standby, can you ping the other side of the...

Joseph W. Doherty commented on Configuration network Spanning Tree in LAN, Switching and Routing 2 days ago

What would be the best STP for communicating between the three? Probably MST.

Joseph W. Doherty commented on HSRP in LAN, Switching and Routing 2 days ago

Also from branch 1's standby "sh ip route 192.168.1.0 255.255.255.0" BTW, you didn't answer my...

Joseph W. Doherty commented on HSRP in LAN, Switching and Routing 2 days ago

As Jon has already noted, HSRP, alone, shouldn't be causing the issue you've described.  I would...

Joseph W. Doherty commented on Difference Between cisco SLA,PBR and VRF in WAN, Routing and Switching 2 days ago

Which is best method for fail over concept in the above three. SLA can sometimes be used for...

Joseph W. Doherty commented on How to enable cache flow in Cisco ISR 4451 router in WAN, Routing and Switching 3 days ago

Like John, Netflow's CPU impact can be difficult to predict. Netflow, when caching, might reduce...

Joseph W. Doherty commented on cpu capacity in LAN, Switching and Routing 3 days ago

You don't - not directly. Datasheets for a router or switch will often provide some performance...

Joseph W. Doherty commented on Catalyst 3750-E in LAN, Switching and Routing 4 days ago

Dell's RSTP might be incompatible with Cisco rapid-pvst. John suggested MST - a version that should...

Joseph W. Doherty commented on VSS compatibility in WAN, Routing and Switching 4 days ago

5 Policy Feature Card 3 VS-F6K-PFC3C

Joseph W. Doherty commented on Network Switch Hardware in WAN, Routing and Switching 4 days ago

I'm too curious how the actual CPUs might help you determine if there's a use for these switches in...

Joseph W. Doherty commented on 3850 Stacked power in LAN, Switching and Routing 4 days ago

I cannot say for the 3850 series, but on the 3750 series there was an amperage limitation on the...

Joseph W. Doherty commented on VSS compatibility in WAN, Routing and Switching 4 days ago

The VS-S720-10G doesn't tell us which variant it is.  It's either a -3C or -3CXL; yours is...

Joseph W. Doherty commented on Load balancing / redundancy on 6509 VSS in LAN, Switching and Routing 4 days ago

Another way to described what Menelaos has already explained, VSS tries to avoid using the VSL...

Joseph W. Doherty commented on VSS compatibility in WAN, Routing and Switching 4 days ago

The 3C is the PFC and your supervisor should have it (or the 3CXL).

Joseph W. Doherty commented on Regarding Cisco 7600 Series Route Switch in WAN, Routing and Switching 4 days ago

...full BGP routing table... Do you mean the full Internet routing table? If so, I'm unsure the...

Joseph W. Doherty commented on VTP database information and best practices in LAN, Switching and Routing 4 days ago

In addition to what the others have posted, if you opt to not use VTP, later devices also now...

Joseph W. Doherty commented on want to know which device support cisco IOS /XE-IOS/XR-IOS in WAN, Routing and Switching 1 week ago

Enterprise class devices, that have been around for a while, still often run IOS. Latest Enterprise...

Joseph W. Doherty commented on High CPU Utilization in Other Network Infrastructure Subjects 1 week ago

That depends on the model, and also depending on the model, what's installed in it or what...

Joseph W. Doherty commented on Creating ACL to block HTTP in LAN, Switching and Routing 1 week ago

Is the web server using port 80?  Then what Jon is showing is what you want to do. If you want to...

Joseph W. Doherty commented on GRE Tunnel using HSRP addresses in WAN, Routing and Switching 1 week ago

GRE tunnel interface command: tunnel sequence-datagrams

Joseph W. Doherty commented on Question about the Shape Average command on a Cisco 3825 in LAN, Switching and Routing 1 week ago

Removing your egress service policy removes the policy itself as a slowdown factor but without it,...

Joseph W. Doherty commented on Question about the Shape Average command on a Cisco 3825 in LAN, Switching and Routing 1 week ago

Well, when your working with high bandwidth WAN links, two issues that come into play are hosts...

Joseph W. Doherty commented on need how many maximum number of switches can stack on different plateform in LAN, Switching and Routing 1 week ago

As Leo notes, the original 2960s do not support stacking.  However, later 2960 series, do, such as...

Joseph W. Doherty commented on Communication between two different network of two location in LAN, Switching and Routing 1 week ago

There are two ways. You could NAT both sites and route between them using the other site's NAT...

Joseph W. Doherty commented on High CPU Utilization in Other Network Infrastructure Subjects 1 week ago

Well, if shifting traffic away from the router has brought the CPU down, then the high CPU was...

Joseph W. Doherty commented on High CPU Utilization in Other Network Infrastructure Subjects 1 week ago

Ideally, you want to capture the stats that Leo requested when the CPU is "very high(80%)."

Joseph W. Doherty commented on How to do qos configurations on CISCO 3925 Router? in LAN, Switching and Routing 1 week ago

You would define a class-map that matches the IP address block used by each VLAN.  Then you can...

Joseph W. Doherty commented on GRE Tunnel using HSRP addresses in WAN, Routing and Switching 1 week ago

Have you tried a GRE tunnel with packet sequence checking enabled?

Joseph W. Doherty commented on is it true that spanning tree loop never occur if all links are using port channel? in LAN, Switching and Routing 1 week ago

MSTP is a "better" variant of RSTP. Juniper supports RSTP, but again, (I recall) they don't support...

Joseph W. Doherty commented on is it true that spanning tree loop never occur if all links are using port channel? in LAN, Switching and Routing 1 week ago

No, STP and port-channel needs don't differ between Cisco and Juniper, either on only their...

Joseph W. Doherty commented on is it true that spanning tree loop never occur if all links are using port channel? in LAN, Switching and Routing 1 week ago

If port-channel is working as it's supposed to, the physical links in the port-channel will operate...

Joseph W. Doherty commented on QoS for Voice and Video in Other Network Infrastructure Subjects 1 week ago

4500 QoS will depend on what's installed in chassis. how can enable it ? How QoS is enabled is...

Joseph W. Doherty commented on Speed/Duplex Mismatch issue in LAN, Switching and Routing 1 week ago

As the other posters have noted, later switches support auto-MDI, but this often requires auto-...

Joseph W. Doherty commented on QOS in WAN, Routing and Switching 2 weeks ago

What's the device and what's the link you're most concerned about? As Georg notes, there are many...

Joseph W. Doherty commented on catalyst 4507r/4510r real redundancy in LAN, Switching and Routing 2 weeks ago

The chassis is a single point of failure.  Although it has a low failure rate, it can take...

Joseph W. Doherty commented on DRAM and Flash memory are related with running BGP? in WAN, Routing and Switching 2 weeks ago

As Georg has noted, RAM is used to hold routing information, so as it grows, so does your need for...

Joseph W. Doherty commented on IOS Update Query in LAN, Switching and Routing 2 weeks ago

Not necessarily. That license just shows at the time you acquired the software you have a license...

Joseph W. Doherty commented on IOS Update Query in LAN, Switching and Routing 2 weeks ago

Understand, although you buy hardware, Cisco doesn't really sell their software, they license its...

Joseph W. Doherty commented on Fram Relay and MPLS work together? in WAN, Routing and Switching 2 weeks ago

#1 No. #2 between FR switches?  Yes.  End-to-end?  Not that I recall, although there might be a max...

Joseph W. Doherty commented on File Transfer QoS Configuration in WAN, Routing and Switching 2 weeks ago

It's possible QoS might improve bulk file transfer rate.  Insufficient information, though, to know...

Joseph W. Doherty commented on Jitter in WAN, Routing and Switching 2 weeks ago

See the section "Packet jitter in computer networks" in https://en.wikipedia.org/wiki/Jitter and...

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