Joseph W. Doherty

Member Since: Nov 20, 2009

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Joseph W. Doherty commented on Cisco ASR920 WAN Link QoS in WAN, Routing and Switching 9 hours ago

so if for whatever reason the router is receiving voice and signaling packets without DSCP value,...

Joseph W. Doherty commented on Discards/QOS Drops on WAN facing interfaces in WAN, Routing and Switching 10 hours ago

Often QoS on high bandwidth links needs adjustment for their queue depths; defaults often are too...

Joseph W. Doherty commented on Cisco ASR920 WAN Link QoS in WAN, Routing and Switching 13 hours ago

#1 By default, routers will accept packets with ToS markings and often just ignore them.  Whether...

Joseph W. Doherty commented on 887VA Bandwidth per VLAN in LAN, Switching and Routing 13 hours ago

You're on the right track, however . . . If you police your non-VoIP ingress traffic enough, it may...

Joseph W. Doherty commented on 887VA Bandwidth per VLAN in LAN, Switching and Routing 16 hours ago

Is it possible to manage egress on the far side?  If so, its egress is near side's ingress. BTW, I...

Joseph W. Doherty commented on Connect Same Subnet From Two Different Distant Locations in WAN, Routing and Switching 16 hours ago

It's very likely a 3750 would not directly support any kind of L2 tunnel, well excluding the type...

Joseph W. Doherty commented on 887VA Bandwidth per VLAN in LAN, Switching and Routing 1 day ago

For your up bandwidth, you're normally better off using prioritized queuing. For your down...

Joseph W. Doherty commented on Best way to transfer an image to many switches in LAN, Switching and Routing 1 day ago

The fastest method is using some kind of management package that can concurrently push images to...

Joseph W. Doherty commented on Connect Same Subnet From Two Different Distant Locations in WAN, Routing and Switching 1 day ago

Georg, neat - I didn't know about this technology. Collins, another possible solution would be to...

Joseph W. Doherty commented on How to assign a VLAN to a router port? in WAN, Routing and Switching 1 day ago

Not sure if 2901 supports IRB, and if it does, whether you could include the built-in routed ports...

Joseph W. Doherty commented on New WAN network rollout - performance issues in WAN, Routing and Switching 1 day ago

BTW, rather than tuning buffers manually, you might see if your platform supports the ...

Joseph W. Doherty commented on New WAN network rollout - performance issues in WAN, Routing and Switching 1 day ago

Actually, I understand MSS adjust works anywhere along the path, for both ingress or egress, so if...

Joseph W. Doherty commented on New WAN network rollout - performance issues in WAN, Routing and Switching 1 day ago

If your video solution doesn't use TCP, MSS adjust won't help.

Joseph W. Doherty commented on 887VA Bandwidth per VLAN in LAN, Switching and Routing 1 day ago

You can police on dialer ingress or VLAN egress to accomplish the same.  The only real differences...

Joseph W. Doherty commented on static routing in WAN, Routing and Switching 1 day ago

To accomplish symmetric routing? There's often nothing wrong with asymmetrical routing unless you'...

Joseph W. Doherty commented on Cisco ASR920 WAN Link QoS in WAN, Routing and Switching 1 day ago

if I already know the voice subnets, can I create an ACL to match on them instead of matching on...

Joseph W. Doherty commented on Cisco ASR920 WAN Link QoS in WAN, Routing and Switching 1 day ago

I generally recommend WRED not be used unless you're a QoS expert.  I especially recommend it not...

Joseph W. Doherty commented on New WAN network rollout - performance issues in WAN, Routing and Switching 1 day ago

The MSS adjustment is often a key component in dealing with reduced performance when dealing with...

Joseph W. Doherty commented on 6807 VSS with Quad SUP6T in LAN, Switching and Routing 2 days ago

I believe the license applies to the chassis.  If you order a spare Sup, you can order it with the...

Joseph W. Doherty commented on QoS in WAN, Routing and Switching 3 days ago

Without further details about your WAN topology and/or QoS needs, cannot really say if you need...

Joseph W. Doherty commented on How to turn on sending flow control packet of C3560CX? in LAN, Switching and Routing 3 days ago

As Mark notes, as pause frames block all traffic, QoS prioritization is often considered the "...

Joseph W. Doherty commented on 2821 Router Query in WAN, Routing and Switching 3 days ago

Unless Chhabi has seen such actually work, from table 1 in: http://www.cisco.com/c/en/us/products/...

Joseph W. Doherty commented on SFP question in LAN, Switching and Routing 6 days ago

#1 Yes, it appears you have 6 SFPs, 4 fiber (not 5) and 2 copper. #2 Generally, SFPs will work on...

Joseph W. Doherty commented on How to replace cisco switch 4507+R blade in LAN, Switching and Routing 6 days ago

show version to see what software is running. show module to see...

Joseph W. Doherty commented on Network Router - Suggestions Needed in WAN, Routing and Switching 6 days ago

If the app is hosted off-site, then you bottleneck might be the capacity of your "off-site" link....

Joseph W. Doherty commented on Retaining system logging message history after reboot in WAN, Routing and Switching 6 days ago

On an IOS platform, you might look for in config: logging <IP Addr>...

Joseph W. Doherty commented on Network Router - Suggestions Needed in WAN, Routing and Switching 6 days ago

What's difficult to do, with just your brief description, is identify your bottleneck. You mention...

Joseph W. Doherty commented on How to replace cisco switch 4507+R blade in LAN, Switching and Routing 6 days ago

Especially as you're replacement is a different model blade, I would insure you have a current copy...

Joseph W. Doherty commented on Batch Hostname Change? in WAN, Routing and Switching 1 week ago

I'm unfamiliar with the NCS 5000.  If they have CLI access, and if hostname can be set via CLI,...

Joseph W. Doherty commented on internet speed in LAN, Switching and Routing 1 week ago

Regardless of what you try, if your ISP connectivity is FE bandwidth, or better, especially if you...

Joseph W. Doherty commented on Switch uplink port MTU in LAN, Switching and Routing 1 week ago

iSCSI is just the kind of application that microbursts will exhaust interface buffers. I had a 3750...

Joseph W. Doherty commented on internet speed in LAN, Switching and Routing 1 week ago

With different ISP, what's the traffic subjected to on their side can be quite different between...

Joseph W. Doherty commented on internet speed in LAN, Switching and Routing 1 week ago

This through the same 891F?  If so, again, understand the maximum performance of small routers...

Joseph W. Doherty commented on Cтек 3750G и 3750X in LAN, Switching and Routing 1 week ago

As the others have mentioned, you can stack them together.  (You can stack any 3750 model with...

Joseph W. Doherty commented on internet speed in LAN, Switching and Routing 1 week ago

Although Cisco documents the 890 series as being able to forward up to 1.4 Gbps, Cisco only...

Joseph W. Doherty commented on SNMP Traps in LAN, Switching and Routing 1 week ago

Your questions might be better addressed on the Cisco learning forums. But in short, public SNMP...

Joseph W. Doherty commented on Limiting Bandwidth for WUA in WAN, Routing and Switching 1 week ago

First, you don't need ToS to provide QoS treatment.  ToS justs improves classification efficiency....

Joseph W. Doherty commented on Network 10.1.1.0/31 in WAN, Routing and Switching 1 week ago

Hi Network 10.1.1.0/31 includes two routes 10.1.1.0/32 and 10.1.1.1/32 As host routes, but...

Joseph W. Doherty commented on Cisco PFR Hub Master Controller Outage in WAN, Routing and Switching 1 week ago

I believe if you lose the MC you've lost PfR.  "Normal" (i.e. w/o PfR) operation should continue.

Joseph W. Doherty commented on Disable QoS consistency check on c4k/Sup7 Etherchannel in LAN, Switching and Routing 1 week ago

Hmm, interesting that there was still a hit, although guess 3 seconds it a bit better than 10....

Joseph W. Doherty commented on Disable QoS consistency check on c4k/Sup7 Etherchannel in LAN, Switching and Routing 1 week ago

What you might try, unbundle your PO links (keeping just one in the PO).  Change the unbundled...

Joseph W. Doherty commented on Policer vs Bandwitch vs Shaper in LAN, Switching and Routing 1 week ago

policy-map PARENT CLASS class-default  shaper 1300000000  service-policy CHILDpolicy-map CHILD ...

Joseph W. Doherty commented on How Pfr inject the routes in IWAN in WAN, Routing and Switching 1 week ago

My experience with PfR predates the later PIRO variants, but assuming it works similar as it did,...

Joseph W. Doherty commented on Routing within a subnet? in LAN, Switching and Routing 1 week ago

I would expect it's not all that common. I've done similar, but generally only when the router is...

Joseph W. Doherty commented on How do you receive your Networking news? in Other Network Infrastructure Subjects 1 week ago

How about "industry press", especially those with on-line sites? Generally they have Cisco and...

Joseph W. Doherty commented on how to delete cisco logs ? in Getting Started with LANs 1 week ago

Bug? Notwithstanding, I believe if you resize the log buffer size, it gets cleared.

Joseph W. Doherty commented on Pfr routing in WAN, Routing and Switching 1 week ago

Like Reza, what you're hoping to accomplish with PfR is unclear. PfR, given a choice of paths,...

Joseph W. Doherty commented on Infrastructure Expansion in LAN, Switching and Routing 1 week ago

The 3750G-12S is a rather unique model, in that it has extra TCAM resources and special SDM...

Joseph W. Doherty commented on Shaping / PPP Multilink in WAN, Routing and Switching 1 week ago

The fact the router accepts the config gives some hope, but I'm not surprised that a policy like...

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Joseph W. Doherty's Stats

Points14748
Discussion started 6
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