Questions tagged [cisco]

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42 views

CDP neighbor discovery

I faced an interesting problem. So, I have Cisco WS-C2960-48TT-L connected with HP Procurve 2626 and Aruba 2930F switches. when I type "show CDP neighbours" command on the cisco switch I see nothing, ...
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45 views

Can you stack Cisco 350 28P PoE switches with CAT5E or CAT6 ethernet cables?

I have four new Cisco SG 350 28P PoE switches, but no stacking cables. Can I use CAT5E or CAT6 ethernet cables to accomplish stacking them?
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ASA Configuration Issues Unsure If It's Related To NAT, Routing, or ACLs [on hold]

ASA Configuration Issues Good Day, I am having issues with my ASA configuration and have thus far been unlucky in determining a solution. I have a bunch of hosts in a DMZ and a couple of client nets ...
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1answer
25 views

How do you define interesting traffic using an IPSec Profile on a Cisco router?

I apologize if this is a duplicate, but I'm having difficulty figuring out how to define interesting traffic on a Cisco router using an IPSec Profile referenced by a tunnel interface. The old-school ...
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1answer
26 views

Get WLC running-config including ALL secrets as plaintext

Our WLC 5508 pair is going EOL. I need to migrate the complete configuration (including secrets) to a new pair of CT3504 WLCs. The problem I have is when I run show run-config commands, username / ...
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1answer
13 views

Session, presentation and application layer

I almost finished the ccna, in the meantime I'm following Pentesting courses, I noticed enough interesting protocols at the session level. I wish I could understand them as I did with cisco, but I ...
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2answers
20 views

STP Loop with Third Party Switches

STP Loop with Third Party Switches I manage a network mostly comprised of older Avaya ERS 3500 series switches. Recently another department has bought a package that comes with it's own server rack, 2 ...
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2answers
48 views

What constitues an STP fail on this setup?

We have a host which has a bonded Ethernet interface. only one is active, at each time, when the other fails, the MAC address moves to the other interface and traffic continues... But at the SP ...
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1answer
32 views

Cisco SMB Switch Configuration for VOICE VLAN and DATA

I am hoping to get some assistance with a current issue I am facing at the moment... I have 3 Cisco SMB Switches, (2) SG300 Managed Switches and (1) Unmanaged Switch. SWSG1 | 172.16.1.100 | Port 24 ...
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18 views

Configure Cisco 3560X switch with all ports interconnected, for dummies [closed]

We are a factory producing PoE devices, but not really using them. Years ago some people with networking qualifications bought this Cisco 3560X switch and tested our first version of products. Today ...
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1answer
90 views

Migrating Configuration - 3750G to 3750X

What is the best practices to migrate configuration from an older Cisco switch model to a newer Cisco switch model? -I am not expecting to change any configuration, just simply want to be on the ...
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1answer
38 views

why do I need the network name between two routers for RIP routing?

the network in my exercise I am learning about networks and I just started to learn about dynamic routing(like RIP) but there is something I didn't managed to understand and is why do I need in the "...
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29 views

Cisco 1841 stuck on boot?

I found an old Cisco 1841 router and decided to boot it up to play with it a little. Everything seemed to be going ok but I guess something interrupted the boot. Last line is %SYS-6-...
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1answer
41 views

Cisco 3750G - SSH Diffie Hellman Group 1 SHA1 Error

I recently implemented SSH configuration on my 3750G switch stack. I have -set the domain name -generated the rsa key using 2048 bits -ensured that the vty lines are set to transport input ssh Now ...
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22 views

Why is Prime 3.4 connecting to scan-prd-2007.cisco.com [on hold]

Our Prime 3.4 Server is trying to connect to scan-prd-2007.cisco.com. Does anybody know what Cisco is doing here? scan-prd-2007.cisco.com (173.37.249.87) TCP/1541
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20 views

Cisco Prime - Enlarge dashlet

Is there a way to make a part of overview window (dashlet?) in Prime Infrastructure larger? I have Network Topology as a part of the overview and I want to make that window bigger - seeing the network ...
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18 views

SFP+ Transceiver Compatibility [closed]

We recently got a tvs-1582tu NAS with 2 SFP+ 10G connections. It will be used for a high throughput application, and copper connections will be enough. SFP+ is a new concept for me, and I see from ...
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1answer
27 views

VLSM - Two Routers 4 Switches 2 Subnets 1 server

im looking to create two different subnets withing this setup, is that possible? But there are some pcs from switch 1 that are from subnet1 and others pcs from switch 1 that are from subnet 2 so ...
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1answer
20 views

Cisco ASA failover monitor-interface policy

I have Cisco ASA 5585 and it has 10G interface in port channel where i configured multiple vlan sub-interface, is it worth to monitor every single sub-interface for failover policy or just monitor ...
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1answer
29 views

How to configure PPPoA on Cisco 887

We are having trouble with a router which will not bring up the PPP session, and our ISP has advised that we must use PPPoA instead of PPPoE (which we're apparently using according to them). From the ...
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1answer
17 views

How can I configure the “DHCP Addr. Assignment” Required on a Cisco WLC 2504 from the CLI?

How can I set the "DHCP Addr. Assignment" checkbox on the WLAN Advanced tab on the Cisco 2504 WLC from the CLI? I think I found something, but it gives me an error and does not set the checkbox: (...
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2answers
35 views

DHCP on CISCO 3850

I would like to configure the DHCP server on CISCO 3850, and reserve around 100 static IP for servers After doing research found that I need to create individual pool for each static maping like ...
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1answer
43 views

What is a meaning of Load balancing Hash

What does Load balancing Hash mean in CEF? Which commands are use to configure? Is it support to other vendors except Cisco? If it is not support other vendors? do they have any similar concept? Which ...
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0answers
36 views

Is there a way to see client roaming activity on a Cisco 2504 wireless LAN controller?

Does the Cisco WLC have sufficient logging to keep track of clients that do fast roaming (e.g. 802.11r, 802.11k, 802.11v, 802.11w) between access points on the same WLC? I want to see that clients are ...
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1answer
105 views

Switching interface VLAN ID Mid-Production

I was wondering if there was a way to switch out the VLAN ID from VLAN1 to VLAN10 without impacting the connectivity of the end users? Can I simply copy and paste from one interface VLAN to another? ...
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0answers
23 views

Does resetting system config of a 2504 WLC change licensing?

I purchased a used Cisco WLC 2504 with a screenshot that says "10 Access Points Supported". I did a system reset on the unit because I didn't know the password. Now, after I login to the web UI, the ...
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1answer
36 views

Is it possible to differentiate cisco ports on monitoring system via snmp?

I am managing some cisco switches in my monitoring software (zabbix), and it provides useful insights that I would like to monitor: Warning on link up / down Warning when ports are on half duplex ...
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1answer
139 views

Cisco ASA 5506: The switching between the two providers by using Route-Map, creation backup channel

We have two providers. I want to make the second provider a backup channel. This configuration is most often offered: object network internal-pat-primary_obj nat (inside,outside1) dynamic interface ...
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1answer
29 views

Cisco S190 WSA and Fortigate 200E Firewall in Network

One of my customer has Fortigate firewalls and cisco Iron port(WSA 190) they have very small User base may be around 300. But their both firewall (200E) and Cisco proxy Server are very powerful. I ...
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70 views

Cisco nexus STP loopguard

I have cisco nexus switches in vPC and they are connected to HP c7000 blade center switches and all my c7000 blade server has Linux Bridge is running, i believe something went wrong somewhere in Linux ...
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1answer
67 views

How to firewall choose routing through ospf?

enter image description here i have this case:on firewall 1 and firewall 2 configure routing ospf and vrrp in the same time traffic go to internet through firewall 1, from firewall 1 routing to ...
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2answers
57 views

Should portfast be configured on the physical interfaces or on the logical port-channel, or both?

I'm using a Cisco 3750 switch and have two physical ports configured in a port channel that connects to a router. Should I configure spanning-tree portfast on the physical interfaces or on the port-...
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1answer
29 views

Which Cisco access points (and what IOS versions) does the AIR-CT2504 wireless LAN controller support?

I have two Cisco 1140 access points and two Cisco 1252AG access points. Can I use the Cisco AIR-CT2504 WLC to manage all of them? What versions of the LWAPP Cisco IOS are required? I tried looking for ...
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2answers
22 views

Multiple 802.1x clients, single port support on a Cisco 3750 switch?

I'm thinking of using our Cisco 3750 switch with our RADIUS server for 802.1x authentication on our Ethernet ports. If I enable 802.1x and a user connects a switch to their Ethernet jack, and the ...
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32 views

What spanning tree IEEE protocol does the Cisco 1252AG Aironet access point support?

Link to data sheet We're running Cisco IOS version 15.2(2)JA1. What version of the IEEE STP is supported on the Cisco Aironet 1252AG access points? We are using the "bridge X protocol ieee" command. ...
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42 views

Unable to Initiate a VPN tunnel using IKEv2

I'm having an issue with a VPN tuunel between my Firewall (ASA 5516-X) and a third party firewall so I can't check the config in the second firewall. So I decide to debug my firewall and I realized ...
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1answer
25 views

Meraki MX64, CISCO SG200 Switches, VLANS

Having issues with allowing traffic across VLANS. I have setup a Meraki MX64 and Cisco SG200 Switches to use 5 VLANs (1-5, 1 = default). I configured some ports on the switches to be members of 2 ...
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1answer
80 views

What is the purpose of a switch routed port?

From my Cisco CCNA documentation: Routed ports are used for point-to-point links. Connecting WAN routers and security devices are examples of the use of routed ports. In a switched network, ...
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3answers
4k views

What is “oversubscription” in Networking?

I have a question about oversubscription in networking. I read a lot of documentation but I still don't understand what it means. I read the following on the Cisco website, oversubscription of the ...
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0answers
17 views

Can you get more than 128 hosts with /25 mask? [duplicate]

I had an exam, and we were given an IP 199.177.63.0/25 and were asked to create two subnets of 66 and 10 hosts. Would first subnet already take 128 addresses? Sorry for stupid question.
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3answers
127 views

How to add multiple ip address in destination ip in acl rule

Iam trying to block a certain host from sending any message to any host in the network is there is a way to do that or i have to deny host by host ?
4
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1answer
137 views

How to connect QSFP+ transceiver with MPO connector and SFP+ transceiver with LC connector?

In data center application, 40G QSFP+ transceivers with MPO connector and 10G SFP+ transceivers with LC connectors are most common transceivers. But, with two different connectors, how can we make a ...
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1answer
59 views

BGP | Advertise a summary prefix out to customer location

I don't know what I should be using for this or how I should go about it. In my lab where I am testing out the BGP configs that I've learned I want my ISP topology to have a summary prefix for the ...
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1answer
31 views

Getting Mulitple Source IP addressess when doing Port Monitoring

I have a Cisco 2960 switch that I'm trying to find which device IP address is connected to each port... My Setup: monitor session 1 source interface gigabitethernet 0/5 monitor session 1 destination ...
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2answers
33 views

How to configure snat between 2 private networks having different nat pools?

Hi, i'm having some problems with the current configuration i have on this network. I have two nat pools one for the blue square routers, and another for the yellow ones. And i'm using snat to have a ...
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0answers
25 views

Has anyone successfully deployed WLC 8.3+ anchored wlan with PSK and CWA?

There seems to be something broken with Cisco WLC 8.3.140 and 143. 8.3 was the first AireOS release training to add MAC Filtering (CWA) and PSK. ISE is serving as the RADIUS server (v2.2). I can get ...
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2answers
47 views

How to configure NAT between 2 private network ? CISCO routers

If anyone can help with configurations it will be helpful
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1answer
34 views

Static routing using 2 routers and 1 multi-layered switch

I'm trying to configure a static route between two routers and a layer 3 switch as follows - Router 0 interface FastEthernet0/0 ip address 172.17.10.1 255.255.255.252 duplex auto speed auto ! ...
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1answer
39 views

Configure RIP routing for 2 routers and 1 L3 switch

I'm trying to configure RIP routing between the 2 routers and 1 L3 Switch. My Router0 configuration - f0/0 = 172.17.10.1 f0/1 = 172.16.10.11 Router#sh run Building configuration... Current ...
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1answer
60 views

Switch updating - Cisco Prime

I'm tasked with mass updating of our Cisco switches via Cisco Prime. Is it possible for the update to fail? Can the switch 'hang' in reboot loop? What if I tell Cisco prime to backup running image? ...