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Cisco Catalyst Center

This community is for technical, feature, configuration and deployment questions. For production dep...

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NFVIS Solutions

Join peers and Cisco experts to discuss Cisco’s Network Function Virtualization (NFV) products and s...

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Join this community to interact with your peers and Cisco about SD-WAN and all things related to sec...

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Discuss Catalyst brand switches with peers and experts.

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ThousandEyes

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Activity in Networking

Resolved! Taildrop avoidance for critical traffic

Hello Experts , I have a critical application traffic which passing though my Cisco ISR 4321 and i noticed that some packets being dropped as Taildrop , Please find below output from packet-trace debug :    sh platform packet-trace summary | i Gi0/0/...

qsosan20 by Level 1
  • 261 Views
  • 14 replies
  • 1 Helpful votes

QOS per tunnel for DMVPN - Spoke to Spoke

Hi AllI am looking at configuring qos per tunnel on my dmvpn.I have a couple of questions.1.I assume the policy applies to the hub end only?2.As there is only 1 MGRE tunnel on the hub, how can multiple qos policies be applied?3.what about spoke to sp...

Resolved! OSPFv3 Route Summarization, RFC1583 doesn't seem to be working?

I have the following topology:IOU3 is the ABR, and is summarizing Area 0 prefixes as a summary route 2000::/16 into Area 1.IOS version: 15.5.RFC1583 is ENABLED on IOU3 (and everywhere else), which means that the cost of the summary route should be ba...

OSPFv3-IPv6-SummaryRoute-metric.png
AK0 by Level 1
  • 295 Views
  • 3 replies
  • 0 Helpful votes

Redundant WAN Design – Asymmetric Routing Issue

Hello Expert,I'm working on a somewhat complex network design and could use your expertise. I have two sites, each with a similar setup: a firewall and a Layer 3 switch.At Site 1, the firewall is deployed in a "router-on-a-stick" configuration with t...

duahimanshu816_0-1751671746624.png

Resolved! Problem with Web Browser and ACL

Hello guys I just made this simple topology with 3 router, 3 switch 3 pc on 1 switch, 3 on other, and last switch with a web server (internet) and a dns server. I also activated RIP between all the routers and ACL permit on the router connected to in...

OwlKun by Community Member
  • 196 Views
  • 8 replies
  • 0 Helpful votes

Calculation of MST cost

Hi all, Could someone please explain to me why I see the things I do with MST? I have the below setup in a lab, where SW1 is configured with the lowest Cost and is the root bridge. Everything is working as expect, in regards to STP, and SW4 is Blocki...

rasmuselmholt_0-1751544990300.png

Resolved! Cisco 2821 Reinstalling OS takes long time

Hello everyone.I’m currently trying to upgrade my compact flash card memory from 256MB to 1GB. I backed all files on the compact flash card using TFTP transfers and archive tar. So far so good. However 2 things:- Once I put the new compact flash card...

ISR4451-X/K9 IP BASE IOS issue

Hi , I'm looking for help on the following issue, i'm CCNA certified since few month, and i have an issue on ISR4451-k9-RF, it seems that my customer is facing issue with IOS IP base, On product hasn't the same type of IOS, see attached screenshots  ...

David.F by Level 1
  • 573 Views
  • 8 replies
  • 0 Helpful votes

Cisco 8200 Throughput

The documentation states that unencrypted throughput is unthrottled and encrypted throughput is controlled by license. What does encrypted throughput mean in terms of the 8200 throughput license restriction? I've read the documentation and I'm still ...

emuman100 by Level 1
  • 148 Views
  • 3 replies
  • 0 Helpful votes

How to get ADSL working through C1117 router

Hi, Does anyone know how to get ADSL working through a c1117? We upgraded to one from a 1841 so I just copied the config over but the dialer wont get a IP address from the ISP. If I look at the dialer int on the 1841 it has a public ip assigned to it...

peat by Level 1
  • 358 Views
  • 1 replies
  • 0 Helpful votes

VSL link upgrade from 10 to 40 Gb

Hi all, On a couple of C9500 40x in VSS I need to replace the 10Gb VSL links with 40Gb links. So I need to go from here: stackwise-virtual domain 255 interface TenGigabitEthernet1/0/39 stackwise-virtual link 1 ! interface TenGigabitEthernet1/0/40 ...

DaniloB by Level 1
  • 1072 Views
  • 7 replies
  • 1 Helpful votes
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