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Questions tagged [cisco]

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42 views

L2 Circuit ober BGP Signaled MPLS

We are providing MPLS Network services to Customers via Ethernet Links. Our CPEs (mainly Cisco) are linked via VLAN Subinterfaces to the PEs (Juniper MX). Due to the increasing demand of Multiple ...
3 votes
2 answers
241 views

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 ...
0 votes
1 answer
17 views

Cisco SF200-24p Simulate the internet for lab testing with VPN

I am currently learning about site to site VPNs. I've been following a guide that uses a router to simulate the internet for testing purposes. Unfortunately the steps to configure a router in this way ...
0 votes
2 answers
265 views

Cisco 9200L has empty config after IOS update

I have uploaded the newest recommended image on a C9200L switch, and its running the new version now. But the config is empty. Do i need to copy the old config again or how do i recover the old config ...
0 votes
0 answers
18 views

Using L2 Switch For Routing [closed]

I'm working at a place that was given both a /29 (LAN) and a /30 (WAN) IP range by the ISP. Instead of a router being used between their firewalls and ISP router, they chose to use a L2 switch that ...
0 votes
1 answer
56 views

How to configure DHCP on CISCO IOS XE with options (60) conditions?

Cisco IOS XE Fuji 16.9: How can I make the client receive the "bootfile" option, depending on what is specified in "option 60"? This is necessary in order to transfer the necessary ...
0 votes
1 answer
533 views

Ping to default gateway failing

I am trying to ping to a default gateway which i have configured as 171.2.0.1 but somehow the ping is failing . I am new to network domain so i have less idea about it . Any help is appreciated .This ...
0 votes
1 answer
37 views

Help on Configuring LACP with Nexus 3000 and Proxmox

We recently acquired 5 new server nodes that will make up our new Production Proxmox VE Cluster. We also acquired a set of 2 Nexus 3172T Switches and are in the process of configuring the Network ...
1 vote
1 answer
22 views

Inner header and Outer header in tunnel packet

What should be at Inner header and Outer header in tunnel packet ? And then we have tunnel IP address(for both router), tunnel source IP address, tunnel destination IP address. In my understanding, ...
1 vote
2 answers
383 views

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 ...
0 votes
1 answer
196 views

Cisco triangle network with static routing not working

I have this network when the network tries to communicate with the routers it fails. I have already tried everything in my power without success. how to assign ip addresses in routing I have been ...
0 votes
0 answers
71 views

Connect PC to HVAC Router

I have a network with multiple Cisco 9300 Switches and 9606 Core switches. We had a PC connected directly to a Carrier i-Vu XT Router. The PC needs to be moved to another building. I connected the ...
0 votes
2 answers
897 views

How do I bridge a Cisco 860VAE-W from VDSL to Ethernet? [closed]

I've got a Cisco 860VAE-W which I'm trying to bridge. I picked it up because I was interested in learning a bit about an IOS device – I'm coming at this pretty raw. >show inventory NAME: "C867VAE-...
0 votes
1 answer
142 views

Best practice for SWV and DAD Cisco 9400

I have 2 Cisco 9404R chassis. In each chassis I have: 1 x 48p 10 Gig ethernet -> slot 1 1 x 9400X-sup-2 -> slot 2 & 3. I know that I should configure Stackwise Virtual between only 1 SUP ...
0 votes
1 answer
32 views

Import config to a new C9200

The task is to replace a legacy C2960X-24PD-L with a new C9200-24P plus its network module C9200-NM-4G. I couldn't find a document on migrating these two models directly so I decided to configure the ...
2 votes
1 answer
1k views

How to virtual-link between two different OSPF areas

Is there a way to connect routers via virtual-link between two different OSPF area?
0 votes
0 answers
15 views

CCNA Collision Domain can someone explain me [duplicate]

I started recently learning for the CCNA and today I learned about Collision and Broadcast Domains. As far as what i understood all devices connected to the hub share single collision domain and ...
8 votes
5 answers
3k views

PAT and Static NAT not working together?

The HQ network is using PAT to gain access to the internet, the internal webserver needs to be accessed from the internet using static NAT. Configs: S_HQ ! interface FastEthernet0/1 switchport ...
1 vote
1 answer
4k views

How to check vlan interface traffic on Cisco nexus 9k

I have Cisco N9K-C9396PX L3 switch which has VLAN interface configured for my LAN gateway and i want to monitor how much traffic vlanXXX handling, I have configured SNMP monitoring to pull interface ...
0 votes
2 answers
587 views

Question about subinterface DHCP relay CISCO

I want to make 4 PC got DHCP IP address No problem with left side, but right side 2 PC can't get IP automaitic. I think the problem is DHCP Relay. How can I use ip helper-address for subinterface of ...
0 votes
2 answers
196 views

Verify brand name of installed SFP on Cisco Switch

I know I can run the sh inv to view the SFPs model and Serial Numbers attached on a Cisco Switch. Is there a way to verify the brand name of each SFP? I have Cisco 9300 and 9606 switches.
1 vote
1 answer
817 views

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 ...
0 votes
2 answers
76 views

Built-in variable for cli commands in EEM (IOS-XE)

So i want to write an EEM that basically starts a seperate script where i check what user is logged on, to which group it belongs and then define if they can or cannot run the command. Example: event ...
0 votes
1 answer
3k views

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 ...
0 votes
2 answers
661 views

Bash script to gather serial numbers from list of cisco switches

I have pieced together a script to login to each switch listed in the file switch.txt, grab the serial number and place it with the IP address into the CSV serials.csv. The problem I am having is that ...
1 vote
1 answer
113 views

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?...
0 votes
1 answer
71 views

How to run 'show run' and enter 'conf t' without password via remote SSH

I have a Cisco Catalyst 4500 L3 Switch and have a user called user1. Switch IP is 192.168.1.1. I have a server which IP is 192.168.2.1. I created a user in my switch and I can SSH into my switch ...
0 votes
2 answers
79 views

Cisco switch running multiple commands at once via remote server

I have a Cisco Catalyst 4500 L3 Switch and have a user called user1. Switch IP is 192.168.1.1. I have a server which IP is 192.168.2.1. I created a user in my switch and I can SSH into my switch ...
1 vote
1 answer
65 views

Cisco BGP RTBH in EVPN fabric

I have Cisco basic EVPN fabric configuration in DC with two spine and couple of leafs using OSFP+iBGP for underlay fabric. My border leaf connected to my ISP using Vrf CUST. I want to configure RTBH ...
0 votes
1 answer
58 views

Cisco nexus C93180YC-EX sflow configuration

I am running cisco nexus C93180YC-EX switch and I would like to enable sflow for collector. I did similar config on 9396PX model and it works but Nexus 93180 is little different. I am running NXOS 9.3....
2 votes
1 answer
499 views

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 ...
1 vote
0 answers
33 views

How to capture switch generated traffic on Catalyst 4500X

I have a Catalyst 4500X. I want to capture traffic associated with the DHCP relay service which is running on the switch. I created the acl: Extended IP access list capture 30 permit udp any any ...
0 votes
0 answers
101 views

What is mean final version firmware ASA 5525-x

Please advise, when reading the “Release Notes for the Cisco ASA Series, 9.17(x) ” I saw the following: ASA 9.14(x) was the final version for the ASA 5525-X" But the current version of our Cisco ...
0 votes
2 answers
45 views

ASA - Redundancy ISP in Multiple contexts

At the moment I am interested in the fault tolerance of the route to providers in Cisco ASA in multiple contexts. As I know, in one context you cannot track the route and change it, but the task is to ...
0 votes
1 answer
151 views

ASDM 7.20 doesn't work with script that works with ASDM 7.13

I have a script I wrote for Linux that enables me to use ASDM with Oracle Java 8. One version I know for sure works is 7.13.1 on an ASA 5516, but when I try the same script with 7.20.1 on an FPR 2110 ...
0 votes
1 answer
40 views

Encapsulation overlapping issue in Vlan Router settings. How do i solve it?

How my setting looks like in the picture I use the gateway as the encapsulation for the router. But everytime i try to add "Developer vlan" (Which in Norwegian is Utvikler) Then i just get ...
3 votes
1 answer
3k views

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 ...
1 vote
1 answer
119 views

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 ...
0 votes
1 answer
261 views

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 ...
1 vote
2 answers
110 views

Can the Cisco SF302-08 switch support IP routing capabilities?

I'm currently working on configuring inter-VLAN routing on a Cisco SF302-08 switch. I've already enabled Layer 3 routing, created the VLANs, assigned them to switchports, and configured the switch ...
3 votes
1 answer
362 views

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 ...
3 votes
1 answer
327 views

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 ...
2 votes
1 answer
246 views

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 ...
4 votes
1 answer
11k views

Why is eBGP receiving updates with `Origin IGP`?

Why is eBGP receiving updates with Origin IGP? Is this normal or just an OS bug? R1#show version Cisco IOS Software, 3700 Software (C3745-ADVIPSERVICESK9-M), Version 12.4(25d), RELEASE SOFTWARE (...
0 votes
1 answer
397 views

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 ...
2 votes
1 answer
209 views

Cisco 9300 switch doesn't connect via SSH

I have a couple of switches that are trunked via a LAN cable from another switch. I noticed that these switches sometimes have a hard time to SSH into. I get the error: "Connection timed out"...
15 votes
6 answers
33k views

How to factory reset IOS-XR?

I want to factory reset IOS-XR. The router used is ASR9000 I'm used to do that easily in IOS doing config-register 0x2102, write erase followed by a reload. I search on documentation, but found no ...
0 votes
1 answer
761 views

Cisco Nexus vPC Portchannel issues

I'm currently facing a network issue between Cisco Nexus 93108 (9.3.11) on an LACP port-channel configuration. The replica below help us to reproduce the issue we had (using 4x Nexus 9000v qcow2 image ...
0 votes
1 answer
200 views

How to configure IDr on Cisco ASA for AWS IPsec tunnels

I am currently facing an issue while attempting to establish IPsec tunnels between AWS and a Cisco ASA firewall. The AWS tunnel logs indicate that the Identity Resolution checks are failing, ...
0 votes
0 answers
49 views

Cisco Aironet 2800i Mobility-Express missing option for conversion

I hope this is an easy one. I'm scractching my head as there are 10-20 articles on how to convert from a capwap firmware to mobilty express for 2800/3800 all using the command: ap-type mobilty-express ...

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