Questions tagged [cisco]
The major provider of networking equipment. This is a generic tag to be used when no more specific tags are available. See the list of tags in Help Center Tag page.
3,759
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Cisco 9500 switch stack
I have a cisco 9500 switch that is live/up in productions but I need assistance or more information on how to add a few more switches to create a switch stack and would like to be pointed in the right ...
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SSH Config on Nexus Switch
Having trouble configuring SSH on 2 Fiber Channel Switches (NX-OS). Any Cisco experts here that can help?
I am pretty new with Cisco and having trouble looking for documentation on SSH config for ...
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Cisco DNAC - case insensitive search
Is there a way to do a case insensitive search using the Cisco DNA api?
Desired results: devices named “TEST”, “test”, “Test” etc
import request
url = "https:///dna/intent/api/v1/network-device?...
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HP 6120XG switch LACP is blocked - error condition
Folks,
I am dealing with very strange issue related LACP and not sure if its bug of 6120XG switch or something else. so let me explain my issue here.
Network Diagram:
I have two Cisco Nexus 9396PX ...
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link asa with core switch to wlc
have 4 switch 3560 POE-8 , 2 of them have been RESET, AND w l c 2100 RESET too, but there are firewall AND ONE switch. Keeps the OLD CONFIG. I try to restore the network to the same old ...
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HSRP IPv6 configuration
Looking at the Cisco documentation for HSRP IPv6 configuration I noticed the use of 'standby 1 ipv6 autoconfig'.
interface FastEthernet0/0
no ip address
duplex auto
speed auto
ipv6 address 2020:...
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1
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475
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Change RADIUS auth method for remote access ipsec vpn
We have a Cisco 3825 router with an IPSec Remote Access VPN configured to authenticate against a radius server. We're retiring the old server and moving to a new one (Windows Server 2012). We changed ...
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Creating an overlay network using ASA and VXLAN over IP MPLS
I need to extend an existing VLAN from a branch LAN to DC. As a matter of fact I noticed that Cisco ASA 5500X have VXLAN capabilities. I am relatively new to VXLAN and I need some help to find the ...
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2
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Inter-VLAN using L3 switch
There are 3 VLANs 10, 20 and 30 on these switchs. Everything such as VTP, DTP are working fine. The problem is that inter-VLAN seems not to work correctly. IP routing is activated on the L3SW (even ...
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Anyconnect Cisco 5505 VPN Group cannot Access Inside Network
Below is the Configuration to my Cisco ASA. I can connect to VPN but then trapped and cannot enter the inside network.
ASA Version 9.2(4)27
!
hostname AwBTech-ASA
domain-name awbtech
enable password ...
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Non VLAN Tagged Traffic Not Going Through Trunk Between Cisco Switches
Good day all.
I am running through a packet tracer exercise and am stuck on where to go next. Forgive me if I am missing something obvious, I have not touched any cisco networking or networking in ...
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What is the recommended destination public IP for Cisco IP-SLA?
I want to implement Cisco IP-SLA, but I am not sure what the destination IP I should use. Any recommendations or advice?
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Cisco WDS, FreeRadius and LEAP
Freeradius got rid of LEAP since some pointrelease of 3.2.x, and I'm stuck configuring Cisco WDS on their Aironet series.
Since forever there was a tweak with LEAP in Cisco configuration like this:
...
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Local Fallback Command Authorization on Cisco ASA when TACACS Server is Reachable
I have a cisco ASA I want to connect to a TACACS server for command level authorization (write and read-only access). This actually works quite good. Further, I have a local fallback user configured ...
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Manually specify a tunnel gateway for an IPSec VPN Connection (ASA)
I have currently got several VPN's on-premise that are setup on the outside interface and using the default gateway on the interface as an originating source of the VPN tunnel.
Although the outside ...
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Unable to connect to the router using ncclient on RedHat 9.0 on IBM PowerPC
I have a simple program using netconf client version ncclient 0.6.13 with Python3 running on PPC64LE Red hat Version Red Hat Enterprise Linux release 9.2 (Plow)
which is using netconf yang to connect ...
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Issue w/ Cisco router and failed NAT and static default route
I have a cisco router that is using a VRF to support a site to site VPN tunnel. I have added a second network to the router for non-VPN standard internet use. My problem is that my default static ...
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CISCO cellular Router cannot reach network via my PC
I configured the cellular and my router is connected to the internet ping (5/5) Success
but I still cannot access the internet via PC
Here is my running-conf
Current configuration : 2271 bytes
!
! ...
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549
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Unable to receive return packets on Azure IPSEC VPN Connection
Trying to get the VPN tunnel to Azure working on a Cisco ISR 1941 but have been unable to get any traffic flowing back from Azure to site.
The tunnel looks to be up and a machine in Azure is ...
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1
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very strange broadcast in LAN with Cisco ASA
Today i have detected Cisco ASA 5505 CPU usage went to 100% and LAN was flood with broadcast (ff:ff:ff:ff:ff) going to 10.0.12.255 address, i have noticed all these activity in wireshark that some ...
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Cisco ISR Zone Based Firewall dual stack not matching returning traffic for ipv6
I have a bit of a problem with my Cisco 1921 ISR config. I have ipv4 (obviously) and also native ipv6 connectivity in my home lab. I am trying to set up the zone based firewall. With ipv4 traffic, the ...
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1
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Certain SSH shell script doesn't run well in Cisco APIC bash
The following ping script is running just fine in both script form and interactive shell
ping-only.sh
date
for i in 10.1.1.1 10.1.1.3 10.4.1.13
do echo -e "\nIP: $i"
ping -c 1 $i | grep ...
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1
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RIP v2 Network Command
I am comparing the Boson ExSim Lab to the Neil Anderson's Lab on RIP.
On one of the labs on Boson ExSim, it asks to configure RIP on the routers, all of which are on some form of a 192.168..0.0/24 ...
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0
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410
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ASA cluster with named interface running PPPoE
I am trying to configure an A/S firewall cluster, and I have the interface configured as a PPPoE client. When I try to configure the clustering on ASDM, I get a message saying that high availability ...
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IPv6 subnetting with different end device requirements
`I have three main buildings with building A with 242 end devices, building B with 54 end devices and building C with 894 device. And all the routers are connected to each other like ring topology. ...
- 82.6k
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ASA ping outside to inside private IPs?
I can ping from pc0 to router0 in other way I can ping inside to outside, but I can't ping from router to pc0. In the other way I can't ping outside to inside, I don't know how to add this rule on ASA....
- 82.6k
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Site-to-site IPsec and rerouting to another IPsec tunnel
We have three different geo sites (SITE1, SITE2 and SITE3) and each site has PFSense firewall installed. Sites have been connected together with IPSec tunnels. Also Site2 is connected to customer ...
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What Does Exactly Happen When A Switch Is Connected To A Portfast Port?
I am trying to get a thorough understanding of what does happen when a switch is connected to a portfast port on another switch that is part of a stable STP network in case of:
1- the port has no ...
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CISCO 9800-L Controller internal dhcp not working - GUEST WIFI
I have been trying to configure a guest network for my Cisco Catalyst 9800-L Wireless Controller for some days now. For the guest network, i want it to use an internal dhcp on the controller. I have ...
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Cisco CP-7841 IP Phone backlight settings not working [closed]
I have a couple of Cisco CP-7841 IP Phones that are working otherwise well, but the backlight controls are not working. I would like to have the backlight off unless the phone is being used (IIRC this ...
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Why do Cisco IOS switches send packets to DHCP servers with zero giaddr field when DHCP snooping is on?
I recently troubleshooted a network where the switch had DHCP snooping turned on and even though the router which was acting as a DHCP server was connected to a trusted port, the client wasn't able to ...
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The Use of BGP Communities
I am studying BGP communities at the moment.
I understand that communities are path attributes which are a way of tagging specific BGP route advertisements in order to ensure proper route selection ...
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Cisco Certificate CA Server and SCEP - adding RADIUS authentication
I am running a CA server on a Cisco ASR1k Router for several years. until now the number of SCEP clients is quite small (below 10) that it is possible to restrict SCEP Downloads by implementing a ACL.
...
- 82.6k
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RMA'ed device configuration [closed]
Just wondering what are the methods that you use when re-configuring an RMA'ed device.
Do you manually configured all the script that runs on the device or is there any efficient ways configuring the ...
- 67.1k
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3
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ONT-Less GPON wth Cisco ISR
i am trying to find out if it is possible to run a Cisco ISR (1000/4000) router directly and without ONT on a GPON port. To my knowledge there is no NIM module for an ISR4000 for this. Does anyone ...
- 527
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Cisco IOS - how can I make the guestshell be reachable via VRF?
I am currently trying to set up a cloud application on the guestshell of an ISR4331. It installs a connector that needs to have connectivity to the internet. I assume the issue is not specific to what ...
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OSPF Advertise only loopback not transit VLAN
I have this topology:
and this configuration:
R1
interface Loopback0
ip address 10.0.0.1 255.255.255.255
ip ospf 1 area 0
interface GigabitEthernet0/0
ip address 192.168.0.1 255.255.255.252
ip ...
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1
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logging host 1.1.1.1 on Cisco C9300
My Catalyst C9300s running IOS-XE have logging host 1.1.1.1 in the config by default. Is that because it is sending logs to it's internal logs store? I can't seem to find a straight answer in the ...
- 67.1k
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NAT configuration behind pppoe with virtual server
my CISCO 3925 router is handling pppoe, NAT, and DHCP server..
My local LAN is 192.168.1.x and it's behind that NAT.
I'm trying to enable access to a DNS server that's on this LAN (192.168.1.191 tcp/...
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Why Fast Ethernet port in Cisco Packet Service is always down?
I built a simple network simulation with Cisco Packe Tracer. I am not able to understand why fast ethernet port Fa0/0 on server Gmail and correspondent port on Router2 are always down. I checked and ...
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3
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Is there a comparable technology to Cisco's DTP from other network vendors?
Is there a substitute for Cisco DTP technology from other vendors? And if so, which ones?
Didn't find anything on google.
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Cisco NX-OS Factory Reset
An easy question actually. How do I do a Factory Reset on NX-OS? That means, how do I completely and permanently wipe all the configuration I've made without deleting the operating system image? There ...
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Can we have two logging source-interface configured on Cisco Switch?
I would like to understand if its possible for us to have two logging source-interface configured on Cisco Switch:
logging source-interface vlan1 (For syslogs)
logging source-interface vlan2 (For ...
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3
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How to connect 3rd party SFP to the cisco switch?
I am trying to connect "sfp-1ge-fe-e-t" sfp module to CISCO Catalyst C3560G-48TS switch.
When i pluged module to the port and following error was shown:
%GBIC_SECURITY_CRYPT-4-VN_DATA_CRC_ERROR: ...
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Gain using single antenna on Aironet 4x4 MIMO device
I'd like to configure a CAP-3602E in order to use with a single element grid antenna.
I assume that when I'm in full 4x4 MIMO mode (all antenna ports enabled), if I have Tx power set at 23dBm, each ...
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Cisco interface vlan (shutdown vs no ip address)
What is the difference in functionality between these two commands.
interface Vlan10
shutdown
interface Vlan10
no ip address
I haven't been able to find any source material, but I've seen other ...
- 98.7k
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Cisco 4500x configure fast-hello interface with multiple ports
I have a pair of cisco 4500x-32 and i configured VSS between then but i am using just 1x 10G interface for fast-hello packet and here is that interface configuration:
interface TenGigabitEthernet1/1/2
...
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Cisco Packet Tracer Connection Error - The cable cannot be connected to that port
There are 3 NICs in the Router1 and 24 available ports in the Switch1.
Is there any reason why I can't connect from Router1 to Switch1?
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CISCO PACKET TRACER "INVALID IP ADDRESS"
Hi I am still new and studying about networks have here 234.1.18.6/29 address and mask but when I try it out on Packet tracer it gets me an invalid message. I cannot understand why this address are ...
- 82.6k
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2
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558
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Breakout from 400Gbps to n*25Gbps
My servers are currently have 25Gbps NIC, but switch ( Cisco Nexus 9300 series) has only 400Gbps.
I would like to be able to break out the 400Gbps connection into four 25Gbps connections. Is this ...
- 82.6k