Cisco is a major provider of switches and routers to most medium and large companies. Cisco devices often run IOS or NX-OS. This is a generic tag to be used when no more specific tags are available. See the partial list of tags in the full Tag Wiki.

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2answers
99 views

Can I configure netflow on router other than Cisco

I am quite confused about netflow protocol. First thing I want to know is can I configure netflow on other router. We have Jflow for Juniper but what about other vendors. Also, suppose if netflow ...
6
votes
3answers
143 views

Cisco Dot1x Port Authentication - VLAN selected based on what domain the user logs on to on computer?

Currently my company has been bought out by another. Due to this, another two companies users will be migrating into our office. It would be super handy if we could have the vlan chosen for the user ...
0
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1answer
218 views

VPN site-to-site with rv180 poor connection (4 Mbps)

I have speed problems with 2 cisco rv180 using VPN Site-to-Site. According to cisco specifications, the IPsec Throughput is 50 Mbps. I have done many tests using Iperf on both sides (NY ans SC) and ...
1
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0answers
125 views

Iperf multiple streams

I need to test my network between two sites using iperf. I'd like to open parallel streams sending data on different (let's say 5 defined) ports, with random length from 10-1000, with random 1-2 ...
5
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2answers
552 views

Cisco console, USB and RJ45?

I have a new Cisco 3750X switch and I want to connect to it via console. Only.... this switch does not have a DB9 connector on it, its Serial port is RJ45. I have a USB to RJ45 cable, and am on ...
0
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1answer
112 views

Proper way to connect Cisco Small Business Switches? [closed]

First time network engineer here. I don't have a large budget, so I need to learn all of the skills necessary without pulling in a bunch of vendors. I'm charged with building out a 350port network in ...
2
votes
2answers
370 views

Why does the Cisco RV180 not let me use a 255.255.254.0 subnet mask with a 192.168.2.1 LAN IP address?

I'm a Sysadmin for a tech company. We have a Cisco RV180 gateway device. We are at our breaking point for IP addresses, so we are changing from a /24 to a /23 subnet to allow for double the devices. ...
2
votes
2answers
62 views

Cisco Network Object NAT to get Internet?

So I've inherited a Cisco ASA 5505, and I have no experience whatsoever with the things! There are two Network Interfaces both WAN facing, and the LAN interface of course. Now in NAT rules, there are ...
0
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0answers
438 views

Cisco 1921 - Using NAT (NVI method) between VRF's slow performance

I'm setting up a Cisco 1921 with two VRF's: one to the internet and one to the LAN. The LAN is in private address space so source address translation needs to happen when the packets leave the ...
0
votes
1answer
227 views

How to allow IGMP traffic on Cisco switches?

I have a network formed by some Cisco switches (a 2960 at the center, some 2950s for distribution). The network uses VLANs, and there are trunks between the various switches. Computers in the same ...
4
votes
1answer
201 views

had a CISCO 2960S dropped in my lap - how to setup the management interface?

Few tasks in the world are more of a joy than to have a chunk of hardware dropped into ones lap with a post-it note that says "configure this for that new subnet". I know my way around Linux/UNIX but ...
2
votes
1answer
220 views

VPN Failover Cisco ASA 5505

So basically we have a Cisco ASA 5505 (we have inherited this from a customer, none of us have any experience with Cisco's). Now essentially we have to WAN lines which we have setup in Failover, via ...
1
vote
1answer
321 views

Cisco Virtual Wireless Controller and Vmware Promiscuous mode

I have read every post and guide in regards to deployment of cisco vWLC. Only part I dont understand is that they make it a huge point that promiscuous mode must be enabled on the vSwitch or in my ...
0
votes
1answer
110 views

Cisco ASA: Why do I sometimes need a username/password when entering enable mode

I'm automating some interaction with Cisco ASA devices. I need to do the following: login over ssh send 'enable', provide enable password send 'configure terminal' send some other commands, never ...
0
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1answer
41 views

Site-To-Site VPN Failover

Conceptually, how does this work/ would be configured in a Cisco environment, I realise this is quite an open question so please let me narrow it down. Let's say we have two sites: SiteA and SiteB, ...
0
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2answers
720 views

LACP Aggregation between Cisco C3750X and HP JD990A

The interface on the JD990A is very cut down. There is a serial console with minimal commands and a web interface. The 3750 is in a 2 switch stack and I am trying to configure cross-stack link ...
0
votes
1answer
138 views

Route being ignored on core Cisco 6500 switch?

This is less likely a bug, and more likely a lack of my own understanding on routing. I am having an asymmetric routing issue where return traffic is going out the wrong firewall. I have an explicit ...
0
votes
1answer
140 views

How do you configure a Lan to Lan VPN on an ASA without using your outside interface IP address?

I have two /28 subnets A & B. My PIX and ASA's outside interface addresses are both in subnet A. I am in the middle of a migration from the PIX to the ASA and need to use the PIX outside ...
0
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2answers
649 views

Cisco ASA-5505 Port Forwarding

I have a Cisco ASA-5505 firewall, which is currently configured to share our internet connection and do NAT for my LAN, as well as forward port 443 to an internal machine. I need to forward port 2222 ...
0
votes
1answer
40 views

How to find where a Cisco CSS VIP is pointing to?

I'm wondering if there's a way to find out where a Cisco CSS VIP is pointing to without access to the Cisco switch? Let's say VIP 192.168.1.10:80 can be possibly pointing to ServerA:10000 or ...
2
votes
2answers
262 views

Cisco 871: IPsec Remote VPN

After having followed several tutorials and none of them worked for me, someone might help me here. I have a Cisco 871 router, version 12.4(4)T7. Currently, I have it configured as a PPTP VPN ...
0
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3answers
591 views

Cisco 881 throughput/bandwidth issue

We have a dedicated 30Mb connection (up/down) from our ISP, but we can only seem to get 10Mb (up/down) from the router. Does anyone know what we're missing, or how we can tweak the settings on this ...
0
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2answers
1k views

Difference between trunk and tagged port

I am reading some wikipedia articles and RFC 5517, studying VLANs, and I don't recognize the difference between a trunk port and a tagged port. From what the material I am reading says, a tagged ...
1
vote
1answer
75 views

Port mirroring, 1 source, two destination disadvantages [closed]

What are the disadvantages of having two port mirroring sessions? I have a Cisco 2960 switch in which there is one session having Gi0/1 as source and Fa0/48 as destination. Is it possible to ...
2
votes
2answers
175 views

How to anticipate spanning-tree changes to prevent packet loss during convergence?

We have a LAN with Cisco switches, redundant cabling and spanning tree. If I understand it correctly, when I pull out a redundant cable (that is currently "used" by the spanning tree) it takes several ...
0
votes
1answer
44 views

Cisco - redistribute prefix [closed]

I had 2 C class IP's: xx.xx.xx.0/23. I must advertise it on BGP protocol. My config is: ip route xx.xx.xx.0 255.255.254.0 Null0 ! access-list 50 permit xx.xx.xx.0 0.0.1.255 ! route-map ...
0
votes
1answer
139 views

what cause sfp not inserted in a cisco 5596?

what cause sfp not inserted in a cisco 5596? I have already swapped sfp to verify not a bad sfp. when I do a sh transciever command it shows tansceiver present.
0
votes
3answers
536 views

TACACS+ - Cisco Router - Failover to local database not operating as it should

I have TACACS+ working and now I am trying to set it up so that it will failover locally if the TACACS+ server is unavailable. My goal is for it to check the TACACS server first, then failover if it ...
0
votes
1answer
61 views

Meraki VPN Traffic Capture

We have multiple offices interconnected via VPN using Meraki switches. I've been looking around and can't seem to find a way, but was thinking it's possible. Is it possible for me to put my desktop on ...
1
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0answers
78 views

“Puppet device” not working with catalyst 2950

I have setup the puppet and made suitable tweaking for puppet device management to work. I have device config set for my switch catalyst 2950. Certificate request and signing works good and when it ...
0
votes
1answer
511 views

Cisco IOS Router and Azure VPN - tunnel established, but traffic is not flowing

I am trying to connect a Cisco IOS router to Azure via the IPSec VPN. I have used the Cisco ISR template to establish a tunnel from my router to Azure. In the Azure control panel, I can see that the ...
4
votes
2answers
864 views

NAT routing and port forwarding on Cisco ASA 5505

I have inherited my first Cisco router and am having trouble understanding how to do NAT port forwarding correctly. ASA: 8.0.2 ASDM: 6.1(1) I have a single external ip address on the outside (via ...
4
votes
2answers
334 views

Troubleshooting network latency

An apartment complex has fiber internet and is experiencing latency problems over the last month. Tenants frequently experience timeouts and corrupted webpages. The current work around it to refresh ...
2
votes
1answer
725 views

Which are the possible reasons for an arp request that is not being solved/answered?

This weekend I was testing a new data link connection from a service provider, and I went through some address resolutions problems. I tested reachability to hosts at the far end using a laptop on my ...
3
votes
0answers
148 views

Puppet Error: undefined method 'captures'

I posted this question on the networkengineering SE site, but it was determined to be off topic.... blah. I'm toying with the idea of using puppet for core network device configuration to increase ...
1
vote
1answer
59 views

Cisco Mobility Services Engine need to recompute RF prediction after changing wall layout?

I'm trying to improve the location accuracy of our Cisco MSE. We're using version 7.4. Whenever I reposition the access points in my map, I am redirected to a waiting screen that says RF Prediction ...
-2
votes
1answer
46 views

vlans communicate with each other

I am setting up three vlans in a cisco router with the following configurations. Vlan 10 Subnet: 192.168.1.0/24 Netmask: 255.255.255.0 Gateway: 192.168.1.1 Vlan 20 Subnet: 192.168.2.0/24 Netmask: ...
0
votes
1answer
243 views

Configuring C2950 with 802.1X/PEAP and RADIUS server

I am setting up 802.1X security on a LAN which has a C2950 switch that controls access from the WLAN to the Ethernet LAN. I plan to use PEAP. I read this the Cisco article on configuring 802.1X ...
1
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0answers
30 views

Cisco CM — forward single user call after hours

CM 8.6 -- Unity 8.6. Our CEO wants calls to his extension to forward to the operator extension, after hours. Do I configure the DN, the device or the user settings in Unity? None? All? Can this be ...
0
votes
2answers
441 views

Cisco router configuration subnet

I am configuring a router to three different subnet as follow. Sub1: 192.168.1.1-254 255.255.248.0 Sub2: 192.168.2.1-254 255.255.248.0 Sub3: 192.168.3.1-254 255.255.248.0 In my ...
-1
votes
1answer
82 views

Access Control Lists & DHCP

Please take a look at this image right here. In the image above you can see a virtual netwerk simulation program (CISCO Packet Tracer 6.0) where I'm trying to setup a network and secure it. However ...
3
votes
1answer
144 views

puppet device fails in the middle of finding facts

I'm in the process of trying to get the 'puppet device' functionality working for configuring cisco switches. What I'm running into is I have a cisco 2960 in the master with a signed certificate. The ...
1
vote
2answers
121 views

Cisco IOS Setting up a password/secret

I'm figuring out the basics to CISCO Ios commands and I am struggling to find out the answer to the following question: What would provide a better protection when you set up a password to allow ...
0
votes
1answer
48 views

RIP v2 summarisation

I am learning ccna, and doing some practice on packet tracer. I have a simple network with two routers, R0 and R1. They are connected to each other through a serial link (172.16.56.128/30). R0 is ...
1
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1answer
24 views

destinantion-based NAT cisco routers

On a Cisco Router I need to translate "NAT" the LAN IP of some PCs based on the destination e.g. Connecting to 172.16.0.0 /24 Transalte to 172.16.0.100 Connecting to 0.0.0.0 0.0.0.0 Translate to ...
1
vote
1answer
2k views

How can I debug Cisco Firewall ASA “Dispatch Unit” very high CPU utilisation from ASDM?

I have recently had my first firewall installed so I am very new to this whole situation. I am finding that Dispatch unit is becoming overloaded and it would appear to be the reason I get serious ...
1
vote
2answers
204 views

Extending a PaGP EtherChannel run beyond the maximum ethernet length [closed]

I have an office downstairs which requires approximately 500 feet of cat-5 to reach. We have a basic L2 switch in a closet at the halfway point which acts as a signal booster, and allows us to give ...
1
vote
2answers
735 views

What determines the maximum throughput of a Cisco router?

I'm looking at Cisco's documentation on the issue http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf and I'm having a hard time getting the numbers to add up. ...
2
votes
2answers
3k views

Factory Reset Cisco SPA504G without admin password

I've been trying to factory reset some SPA500 phones, specifically the 504G but the old provider has locked out everything. I need to reset about 50 phones for use with a new service. I've man in the ...
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votes
1answer
70 views

Cisco Basic Router Configuration [closed]

I'm pretty new to networking and I've just got started into using cisco packet tracer (a network simulator program). My topology is basically a router, two switches connected to this router and per ...