Questions tagged [cisco]

Cisco is a provider of switches and routers to commercial consumers. Cisco devices run IOS or NX-OS operating systems. 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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FTP performance issues - VMWare, cisco etc

We are experiencing FTP performance issues. Looks like speed drops dramatically the more hops we are away from the server. Cerberus FTP server, running on VMWare. 2 machines on the same VMWare host ...
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Ansible: Pulling a specifc piece of information from an output

I'm trying to grab some information from the output of a playbook and save in a file for review. tor.j2 is just a list of expected lines in the config: logging , ntp, spanning-tree, etc. tasks: - ...
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Network design in packet tracer

I am beginner to computer networks and had assignment to design a network based on the question. The question is given below. I have developed a network design in packet tracer. Can anyone help me ...
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High Packet Loss on Device when Plugged into Unifi Network

We have 3 large format projectors of the same model on our network all plugged into a small switch. Recently, we have been unable to reliably load 2 of the 3 projectors' web management pages. Further ...
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Possible STP Issue with Cisco SG350 Switches

we are having a weird issue with a network of Cisco SG350 Switches that I cannot figure out. We are thinking it may be related to STP but have verified all the normal problem points (i.e. proper ...
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How do you prove RFC 791 - Internet Protocol

We are being asked to prove we are using RFC 791 (Internet Protocol) within our network. How does one prove such a thing via documentation if there is no such document from the vendor stating as much....
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Can't ping or traceroute through EC2 using AWS Site-to-Site VPN to Cisco ASA

My VPC is connected to Cisco ASA, tunnel is shown to be UP in the AWS console. What is working: The engineer on the Cisco side has successfully pinged my EC2 instance within my private 10.5.0.0/17 ...
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Replacing option 54 in DHCPNAK. Cisco Catalyst 6509

Good afternoon. Faced a problem on Cisco catalyst 6509: In packages of the type - DHCPOFFER / DHCPACK, option 54 is substituted for the cisco address. But this does not happen for DHCPNAK packages, ...
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How to assign user role when authenticating Cisco switch with Radius server and LDAP?

I'm setting the Radius server to remote login by LDAP user. I use freeRadius. The problem is default user role is network-operator. I want to know how to upgrade user role to network-admin. I've ...
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Blocking SSH access from WAN side of CISCO 890 to management plane

I've been round about the houses with this one for days, i've not found a solution yet that works. I haven't found a way to block the HTTP access to the management plane either, i had to give up and ...
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Windows Server 2016 - Error EapHost when connecting to NPS from Cisco Access Point

I have a simple setup: Cisco Access Point (old one AIR-CAP3502I-E-K9), and it is connected to an older Cisco Switch, and to the switch, the same VLAN, I have a Windows 2016 server. The server has ...
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I can't PING to my Cisco router when I try to access the domain server

I have this network image I tried to connect the pc1 to the domain (in Windows Server 2012). To do that I tried to PING from pc1 to the server and that works. After that I go the pc1(Windows 7) and I ...
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Cisco ASA Multiple Context Mode --- Cascading Contexts

We are setting up a FirePower 2110 running ASA 9.17 in Multiple Context mode. The Cisco documentation states that you can cascade contexts. The documentation states "the outside interface of one ...
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Linux is answering (wrong?) to Gratuitous ARP message

I've a Centos 7 Linux server with 2 physical interfaces, each of them has 2 subinterfaces, which are P2P /31 interfaces two Cisco. After changing neighboring Cisco devices Linux router started to ...
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Cisco 9500 - Port-Mirror port 80 & 443 traffic from source interface to destination interface

I have Cisco 9500 series switch which has Interface 1 & 2. Requirement is the port 80 & 443 traffic on Interface 1 should be port-mirrored to Interface 2. Is this possible on Cisco catalyst ...
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How can I download the cisco running config to my C drive's folder?

I am going to download the running config from the cisco router. I have tried the following command, but it needs to change the account's privilege level to 15 for downloading the running config. I ...
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Cisco Switch - Enable Telnet using HTTP

I'm trying to automate the configuration process of a Cisco switch (SG-300). I was able to automate everything I need using telnet, but the last issue I still have is to enable telnet itself. For now ...
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propagation Vlans name and id number between core network cisco asr and aruba 8300

hello my need is to have my cisco network core interrogate the vlans used and the name of the vlans and to propagate them on my hpe aruba network core. the cisco core network supports vtp and the ...
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2 default gateway to one subnet. One gateway in security device and other one in 2960 XR switch

Subnet 10.3.20.0/26 connected to switch (multilayer) through a vlan. Same vlan there is no svi in that switch. This vlan extended to Asa one interface and gave one ip address and that IP address is ...
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Bad mask /30 for address 10.1.1.3 || Cisco P.T

So basically I'm having this issue while trying to configure the serial of 3 routers (router0, router1, router2) on Cisco Packet Tracer I was able to configure both serials for router0 following this ...
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ISC DHCP Server - Matching client identifier won't work for single device

I hope someone can help me with this problem. What am I trying to do I want to provide information to a Cisco ASR1k depending on its serial number. Reason for this is I don't have any MAC address of ...
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RESTCONF install operation not working - CISCO router

TLDR: I want to automate installation of a router IOS using RESTCONF. I'm attempting to use this RESTCONF operation: "Cisco-IOS-XE-install-rpc:install": "/restconf/operations/Cisco-IOS-...
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Best way to reformat a JSON with Ansible?

I have this JSON in a variable : { "device_vlans": { "1": { "name": "default", "interfaces": [ "GigabitEthernet1/...
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NAT-Reflection on Cisco ASA 5508-X

We have 2 internal networks in our environment. 10.1.x as a main network (with different vlans) and 192.168.1.x/24 as WiFi for our travelling users. Both are connected to our Cisco ASA 5508-X and then ...
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I need to figure out how to buy a used server. What is the thing called that pulls out from a stack server an has a screen on it an keyboard?

I want to buy the computer that technicians use to repair or configure stack servers it looks just like a laptop but has hot swappable harddrives. I'm entering a i.t. program an I'd like to mess with ...
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Line protocol on Interface GigabitEthernet1/0/1, changed state to down

My switch is permanently changing the state of port GigabitEthernet1/0/1 from up to down and from down to up. What can I do? Console Output: Port configuration: Sorry, I have only these pictures. I'...
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How to connect to a Cisco VPN in "native mode"?

I need to connect to a VPN, but I am not an expert on the subject at all, so if anyone can help me, I would appreciate it. I was given the following data, telling me that this info is for a "...
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Propagate local time over NTP to LAN

I have synchronized my L3 switch to an external time server, this is working correctly. However I'm in Europe and we have CET/CEST switching and I get UTC from the configured time server. I did setup ...
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Ways to log exact wifi connection establishment issues

I have recently started working with a museum (UK) who's 1-year-old Cisco wifi setup has been experiencing connectivity issues from day 1. Essentially a significant proportion of devices (both in-...
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Cisco nexus VM does not booting as i expected

Host Specfication Hardware CPU: AMD Ryzen 7 1700X Memory: 32GB Motherboard: ASRock X470 Master SLI/ac Software OS: Proxmox VE 7.1 Kernel: Linux 5.13.19-4-pve #1 SMP PVE 5.13.19-9 VM bios: ovmf boot: ...
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Cisco MDS NX-OS reload in command

I am configuring a Cisco MDS 9148T. It is running system: version 8.4(2d) (system image file is: bootflash:///m9148-s6ek9-mz.8.4.2d.bin). I wanted to make use of the "reload in" command ...
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How do I upgrade Firmware on Cisco SPA50X VOIP Phone?

I downloaded the latest Firmware for my Cisco SPA504G. However, the usual .exe file used to perform the upgrade was not bundled with new firmware. Nor did the release notes provide any clues about how ...
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how to enable intervlan between juniper core switch and Cisco catalyst 1000

i have a juniper 4600 core with 2300 Access switches in my VLAN, one of the 2300 failed and replaced with cisco 2300 in one VLAN, DHCP is assigning IP to clients and internet is working fine, the ...
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Connecting Azure Site-to-Site VPN to On-prem Gateway with 2 public IP's

I have a cisco ISR on-prem with 2 endpoints (primary and secondary) and I want to connect my Azure VPN Gateway to both endpoints through a single connection (same local address space for both IP's). ...
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Nexus 3548 subinterface statistics missing

I am trying to get statistics for subinterfaces on a Cisco Nexus3500 C3548P-10GX switch. The subinterface is configured for a port channel as shown below. interface port-channel3.1802 encapsulation ...
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Trunking between two Cisco 3750s to another desktop switch

So I'm trying to scrape all the memory I have from college where we used Cisco almost a decade ago, but I haven't touched them since then. I'm trying to clean up our internal network a little bit ...
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How to implement backup link via VPN

I have a PTP wireless network from one location to another and it is working well. I would like to have a VPN backup in case it should ever go down. How can I make this happen automatically? I am ...
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Kiwi syslog server not displaying logs

I'm using kiwi syslog server, by checking the syslog.txt file I've seen an error saying (10061) the requested connection has been refused by the remote host. I have validated all the configurations ...
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How to add ANY ANY Cisco ACL Rule?

I want to test if my core switch is blocking traffic using ACLs as we are having an issue with devices downstream of our Cisco L3 switch. When trying to access our firewall, etc using a non standard ...
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Routing between two Cisco CSR1000v instances on AWS

I'm building a lab in AWS with Cisco CSR1000v virtual routers. I've tried both the below options. In option 1, there's no way to force the traffic from linux1 or 2 to the respective CSR routers since ...
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Ansible populating a variable based on a json param with a json param

I have a variable containing json: { "ansible_facts": { "ansible_network_resources": { "interfaces": [ { "...
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No Access to Cisco ESA from different VLAN

I am in the process to migrate to separate Vlans from a single 10.1.0.0/16 subnet on VLAN1 In the existing /16 subnet is our Cisco Mail Security (ESA). In a new Vlan Segment for clients (10.101.10.0/...
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Cisco firewall rules to iptables

Is there any way to covert cisco firewall rules to iptables (preferably through a maintained library or a script)? Also what are the semantic/logical differences between them?
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Why I'm Getting "Service web-cache lost on WCCP clinet" error on cisco router?

I'm configuring wccp and squid. Here is wccp configuration or router: ip wccp web-cache redirect-list wccp-access group-list wccp-server ! interface FastEthernet1/0 ip address 10.10.10.1 255.255.255....
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Configure a cisco ASA 5550 behind a modem

i have an internet box that i can setup in router mode or bridge mode. Then i have an ASA 5550, that i would like to use as a vpn server (anyconnect) + later site to site connected to another asa 5550....
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Issue with rsyslog creating mutliple log files from a remote cisco switch

So here is our setup Server: rsyslog server - CentOS 7 Client: Cisco Catalyst C6880-X-LE /etc/rsyslog.conf from the CentOS 7 server: $ModLoad imuxsock # provides support for local system logging (e.g....
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VLAN Inner Talking

I kinda forgot about CISCO in general, it had been quite a while since I last touched packet tracer. Now I'm on the PRE-deployment phase of a network at work. Long story short. -I made 2 VLAN on CISCO ...
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Connecting an SFP+ port to a QSFP28 switch

Background - I am working with a client trying to get a new Dell R540 server onto the client's network. They provided me with a single port on their Cisco Nexus 93240YC-FX2 Switch to connect the ...
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Mac OS built-in VPN client Routing Table issues (Cisco IPSEC)

I have a Macbook Big Sur 11.5.2 and I’ve spent now quite some on this particular issue but I cannot figure it out. I need some help from people that are more expert than me on the matter. Background ...
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Why CISCO-ERR-DISABLE-MIB trap does not show interface and vlan information in Icinga?

I have a cisco and a monitoring server with icinga (a.k.a. nagios, thruk). I want to receive traps from cisco and show them in icinga. But I am unable to see the interface and vlan for the errdisable ...
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