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.

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SSH into home lab switch [closed]

I have a home network on the 192.168.5.0/24 subnet using a pfsense router. I'm trying to setup a home lab with some older Cisco routers and switch 1841 and 2960 respectively. My 1841 is plugged into ...
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Cisco C927 with Virgin Media connection [closed]

I think I am missing something really obvious in my config to get my router to work on a Virgin Media fibre connection. Would anyone mind taking a look over my config and pointing out the obvious bit, ...
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Working with credentials encrypted credentials on Aruba / HP switches

I come more from a cisco back ground and there when i show the running configuration i can see the encrypted / hased local user password. This makes it more secure to have in a automation tool where I ...
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Putting vrf on an OSPF statement, interface question. Using CML

If you put the ospf statement with a vrf Router ospf 1 vrf OUTSIDE network 10.10.10.10 0.0.0.3 area 0 area 0 authentication message-digest when I go to put the ospf on an ipsec tunnel ing tu0 ...
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What is the best way to update a Cisco Switch? [closed]

I have to update the IOS for a Cisco Switch. What is the best way? Should I do it via TFTP or USB? What are the steps or CLI needed?
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Does modifying a ASA tunnel create a downtime?

I inherited a cisco ASA, I never really had to manage one before. But, I need to modify an existing tunnel to add IP addresses to both the local and remote traffic selector, specifically there are ...
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36 views

What are the benefits of using MP-BGP multicast address family, under the context of inter PIM domains multicasting?

Under the context of inter PIM domains multicasting, 1 RP on each PIM domain (2 domains), attached with eBGP, with MSDP peering to exchange the actives sources, what are the benefits of using the MB-...
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Cisco FTD DHCP option codes

I have a Cisco ASA 5515-X that is currently running ASA with the FirePOWER module, which cannot sent option code 60 in the DHCP request. My ISP requires me to send this. Does anyone have FTD 6.4 (or ...
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Cisco ASA 1010 “enable password not set” even though it is [closed]

I have some experience with Cisco but im by no means an expert. I have an ASA 1010 firewall and whenever i login to ASDM, i always receive the message "enable password is not set". all my ...
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How to configure IP addresses in cisco packet tracer?

Hello I am working with Cisco packet tracer. I have two laptops connected to a wireless router with IP addresses assigned using DHCP. The router's Internet IP address is 10.1.0.0 and the LAN address ...
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ip network engineering [duplicate]

An ISP is granted a block of addresses starting with 150.80.0.0/16. The ISP wants to distribute these blocks to three groups as follows: a. The first group has 200 medium-size businesses; Design the ...
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STP Portfast Networks

I have switched network and on all access ports I've configured spanning-tree portfast edge When I enable spanning-tree portfast networks on trunk ports 1/0/51-52 every access port is blocked. Do I ...
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Accessing HTTP Secure Server on Cisco IOS

I have a Cisco ISR4331/K9 running IOS XE Version 16.09.04 which I have configured with a hostname, domain name, and generated 2048 bit RSA keys on, I have also verified the clock is set correctly. ...
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How does a Cisco router determine if a packet is IP routed or label switched?

How does a Cisco Router (IOS-XE) decide if a Packet will be MPLS Label switched or ip routed? In a Juniper MX MPLS Pathes have an own Administrative Distance (or Preference in Junipers wordings) So ...
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How to gain access to a service remotely? [closed]

I want to gain access from a pc in my network, to my Server in the same network and prove if my pc can make IPV4 and IPv6 connectivity with the Server. Is there a way to do that, using command line?
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BGP Cisco best practices to filter client asn and prefixes

I have two bgp routers. OSPF as IGP and on Loopback's iBGP. Both routers have different peers, but both receive full routing table. I have to connect client through BGP and give him full table. Client ...
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BGP Cisco internal and external distance

I have two bgp routers. OSPF as IGP and on Loopback's iBGP. Both routers have different peers, but both receive full routing table. In google I found on many presantations "bgp best practisec&...
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Ikev2 ipsec issue between Asa and sonicwall (issue resolved) but need understanding

Really need your help Need help in understanding an issue faced when creating a tunnel between Asa and Sonicwall (Issue got resolved) still need help to understand. SonicWall: Phase 1 Ikev2 Encryption ...
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Cisco 2960x Stack IOS version mismatch

Hope some of you already have some hands-on experience with that - if you're adding a new switch to the stack and you get IOS version mismatch, can you still copy the bin image from the master to the ...
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Is it possible to configure DHCP on a router or UTM firewall for the multiple VLANs on L3 Switch?

I'm working on expanding our office network to accommodate more users/devices. Currently we have the DHCP configured on a UTM firewall(cyberoam ing50) device(cum router) providing IP addresses for ...
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1answer
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Can't send message from RIP to static through BGP

Before deep into the question, please see this topology and the results of sending messages from one router to the other router: I have succeeded in sending a message from R0 to R2 (or vice versa), ...
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In gnss3, why can't I ping my cisco router from my VM?

I have the following network, I have never configured a Cisco router before so I'm having a little trouble. In router R1 I used the following commands to assign an ip to the router: configure terminal ...
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1941W wireless clients losing DHCP IP address [closed]

I am attempting to 'extend' a 192.168.1.0\24 network with an experimental network 192.168.10.0\24 using a 1941W router. I have configured 1941W to distribute a 192.168.10.0\24 network, with WLAN ...
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TCAM carving question for Cisco Nexus 9396PX

TCAM carving question for Cisco Nexus 9396PX I have Cisco Nexus 9396PX and configure for IPv4 with IPv4 RACL on SVI to block some basic traffic. Now i have configured IPv6 and trying to configure ...
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Network topology with big spanning tree diameter

I have a quite big network with spanning tree diameter 26 (if I count it correctly). It is build on Cisco swithes (mainly Catalyst 2960 and Catalyst 1000, two SG350), running rapid-pvst. It is now ...
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Cisco ACL numbering

This is a small technical question. I can't seem to find any information on this, so I thought I'd ask here. I'm currently studying for my CCNA and I'm currently on the topic of ACLs. On IOS standard ...
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What is the impact of “no switchport” with “no ip address”?

I've a monitoring tool named Spectrum from CA Click. It automatically forms links between devices by check their configuration, and etc. Recently a change was made on my switch by a regional and the ...
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question about 4500x enterprise license

i have a cisco 4500x switch and here is the license output : Switch#show lic all License Store: Primary License Storage StoreIndex: 0 Feature: entservices Version: 1.0 License Type: Permanent ...
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1answer
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Many ways of configuring MPLS pseudowires, and choosing only one

I am discovering MPLS configuration on Cisco ASR920, and for almost any "thing" that can be configured, there is often two or more ways to do it. For example, given this configuration: ...
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199 views

Cisco, Router can communicate; hosts cannot

I am learning CCNA related tasks, I have picked up a Cisco 1900 Series router. I am attempting to set it up behind my existing router (Comcast standard router). My "Real" network is 10.0.0.0/...
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EVPN+VxLAN strange silent host issue

EVPN+VxLAN very strange silent host issue I have very basic EVPN+VxLAN design where i used OSPF/Multicast/BGP/vPC technologies to build small size datacenter. L2VNI working great without any issue. I ...
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Ping using 127.0.0.1 [closed]

My question is about this case : I have a PC with 2 NIC (Network interface card ) , when I do ( ping 127.0.0.1) ** which nic will be the ping tested on ? **
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Cisco Nexus Switch Initial Configuration

We just purchased a Cisco Nexus 93108tc-ex switch to replace an old HP switch. I am new to Cisco-NX-OS. Before putting it into service, I wanted to do a quick check to make sure things were good. I ...
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1answer
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EIGRP : Feasibility Condition not satisfied

What happen if the Feasibility Condition not satisfied and we can not pick a feasible successor?
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1answer
136 views

Finding the right BFD timers between Juniper QFX5110 and Cisco ASR1000

I am trying to configure BFD for both OSPF and BGP on the Cisco ASR1000 (non X) and Juniper QFX5110. The problem is that the QFX doesn't officially support BFD timers lower than 1000ms without ...
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1answer
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Arista adding multiple route-map match interfaces?

on Cisco, I could do the following, route-map abc permit 10 match interface Vlan1 Vlan2 Vlan3 set metric-type type-1 But seems on Arista EOS I could only add one match interface, how could I add ...
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What is BTU/hr gauge of Cisco ISR4461/K9?

I searched everywhere but couldn't find it. If anyone knows the system, can answer? How much BTU (British thermal unit) /hr uses by this router.
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Is it possible to connect a router and a switch using fiber-optic cable in Packet Tracer?

Second question: Is there a way to connect a router and a switch using fiber-optic cable? I am trying to connect a switch that has multiple servers connected to it to a router. The switch that I have ...
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NAT cannot communicate with 2 network

I have configured BGP for routing and NAT for HQ and Branch. I can ping from windows / server to public IP and also Linux Mint ping to public IP. but, I cannot ping / communicate between network HQ to ...
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How do I know the switch is layer 2 or layer 3?

Is it possible to find the switch is Layer3 or Layer2 in (Switch)CLI? Is there any command to check whether the switch Layer(Layer 3 or 2) in CLI?
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How to Change the Date on Cisco Catalyst 3750x Switch

We are using cisco catalyst 3750x 24 port switch series How to Change the Exact Date(Singapore) on a Switch ASW-G-L09-001#show running-config Building configuration... Current configuration : 11883 ...
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1answer
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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 ...
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ASA ping outside to inside private ip's?

i am new asa and cisco as well , what i am trying to do to perform this lab , only 1 issue is there , i need help in it, i can ping from pc0 to router0 in other way I can ping inside to outside , but ...
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1answer
27 views

Where can one find how much memory is currently allocated to logbuffer?

Do you know where it can be checked, how much memory is currently being used by the logbuffer? some-switch#show log | i Buffer|Trap|udp Buffer logging: level debugging, 2268 messages logged, xml ...
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330 views

BGP Best Path Selection Algorithm

According to this cisco document (https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13753-25.html), shortest AS_PATH is the #4 algorithm in the sequence to evaluate, out of 13 ...
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How to deny ICMP from 1 host on the server - Cisco Packet Tracer

How I can to setup the server firewall to deny any ICMP traffic come only from host 1 while permitting the other. host 1 is a switch Vlan = 192.168.10.2/24 when I do Remote Ip = 192.168.10.2 Wildecard ...
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1answer
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Trex not receiving any packets

This is my setup to benchmark my server Diagram Trex version v2.88 Trex server MAC ens2f0: f8:f2:1e:5c:bf:78 ens2f1: f8:f2:1e:5c:bf:79 DUT server MAC eth0: fa:16:3e:1c:be:82 eth1: fa:16:3e:d5:37:b1 ...
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1answer
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4500X performance question

i have a pair of 4500x in VSS with 950x SVI and 6x BGP peers with no full tables (there is no other configs) now i want to configure 4-5x GRE tunnel and and 1-2x gre tunnel will have around 500mbps ...
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1answer
47 views

Cisco ip helper-address

I am looking at the DHCP documentation and i cannot seam to find how to configure the router to use a loopback interface as the relay-agent. My objective is to use option 82 so that the dhcp server is ...

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