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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.

2
votes
1answer
14 views

EIGRP unequal load balancing, variance command

Is correct to say that the value inserted in the variance command, lets say the value of "2" on a route that has a cost of, lets say "100", will unequally load balance all routes up to a cost of 200 ? ...
2
votes
1answer
67 views

EIGRP Auto-summary

One more question about EIGRP, EIGRP auto-summary what is the impact on the network ? i was reading about but it was not clear for me. And why is it a good Cisco practice to be disabled ? I am ...
1
vote
1answer
25 views

EIGRP metric claculation

I have a question regarding the EIGRP metric system. so if K1 is the Bandwidth and formula is : (K1 * BW + ((K2 * BW) / (256 - LOAD)) + K3 * DELAY ) * (K5 / (RELIABILITY + K4) Whats is BW and ...
0
votes
0answers
16 views

AIR-AP1832I-E-K9C no CiscoAirProvision SSID is showing?

Just trying to setup a AIR-AP1832I-E-K9C but no CiscoAirProvision SSID is showing? Anyone know what to try as the Mobility Express manual only has 4 steps and I have done them all and can't go any ...
0
votes
0answers
22 views

Cisco 2900 router disconnects from internet [on hold]

I have a Cisco 2900 router at work. It disconnects from the Internet randomly. But everything on the LAN works. I know its not the ISP modem because i have a laptop connected directly to the modem and ...
1
vote
0answers
29 views

DHCP over Frame Relay [on hold]

I have two co-operate buildings. Building A is connected to building B via frame relay. Building A has the main switch server (with VLAN info) and a DHCP server. I need Building B devices to receive ...
0
votes
0answers
10 views

SDN network simulation [on hold]

I'm doing a research on ARP spoofing in SDN. I need to simulate this attack. Is there a way to create a virtual SDN and do the attack on it?
0
votes
0answers
23 views

What is the correct way to add a standard access control list entry?

I have been learning to add standard access control entries like this access-list 10 permit host 192.168.2.50 But I find the other way better ip access-list 10 permit host 192.168.2.50 As the ...
2
votes
0answers
22 views

TCAM utilization on Nexus 9396 switches

I have Cisco Nexus 9396 switch which is running L3 mode and i have configured bunch of IPv4 access-list in Ingress for firewalling to block certain traffic. I am reading about TCAM and wanted to ...
0
votes
0answers
17 views

NAT->Multicast Setup->ACL? [duplicate]

I am a network newbie and would be amazing for some help. I trying to input multicast (239.10.1.11) onto a router 0/0 interface and would like to output multicast on (239.0.0.2) on interface 0/1. The ...
2
votes
1answer
33 views

VLAN Interface is down, protocol is down

I have Cisco Layer 3 switch with IP routing enabled on it. I have different VLANs configured on it and its working perfectly. Now i have added another VLAN (SVI) and assigned that VLAN to one of the ...
1
vote
1answer
79 views

Keep Cisco site-to-site tunnel up permanently

I have Cisco ASA site-to-site tunnel with remote and which i don't have control. I have following config: crypto ikev1 policy 10 authentication pre-share encryption aes hash sha group 2 ...
5
votes
1answer
363 views

Assigning a single switchport to different VLANs

I've been trying to figure out how to achieve the outcome below. VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- ...
6
votes
1answer
258 views

Bandwidth limit Cisco 3400 ME problem

I want to limit bandwidth (speed) of interface of Cisco 3400 ME switch. I did these: policy-map parent class class-default shape average 64000 And in gi0/2 interface I apply it: service-policy ...
0
votes
0answers
12 views

Cisco ASA Site-to-Site IPSec VPN [closed]

I need to setup VPN from my PC to a remote server that I have no control of and was just given the following specs: VPN Gateway Device: Cisco ASA VPN Peer Gateway IP Address: x.x.x.x VPN Interesting ...
-1
votes
0answers
17 views

How to connect vlan 10 or 20 pc with vlan 30 or 40 pc having separate routers betwwen them [closed]

I have configured the router and switch so that the pc can ping their gateway. Vlan 10 pc can ping vlan 20 pc,vice-versa and vlan 30 pc can ping vlan 40 pc vice-versa. But giving the static routes i ...
1
vote
1answer
19 views

How to: Setting up SNMP on various Cisco platforms

How do you setup SNMP on different Cisco switches or routers? Is it possible to limit the IP addresses/subnets, that can access the SNMP communities via access lists?
1
vote
1answer
30 views

using 802.1x with nic teaming

I am working on a project which is mandatory to have each pc configured with two network interface cards as a nic team. I want to use 802.1x for authentication with a radius server like cisco ISE. My ...
0
votes
0answers
12 views

I have no communication (ping) with l2 switch on a different subnet [closed]

I have no communication between PC-2 and vlan of switch l2 that is in another subnet. Vlan 20 is configured on the 0/0 and 0/1 interface that are in access mode. The default-gatway on the switch is: ...
6
votes
1answer
144 views

MSTP and Rapid-PVST+

We have a medium sized network running all Juniper except for one building. This building is shared with another group, and is completely Cisco. We just trunk our VLANs up there. Our Juniper network ...
1
vote
0answers
28 views

mLACP / MC-LAG between Cisco / Juniper

I am working on a LDP signalled VPLS topology (picture) What I am trying to accomplish here is to establish a redundant connection to CE1. CE1 has both interfaces in a port-channel with an IP. My ...
0
votes
0answers
23 views

Deploying Segment Routing in Cisco XRv9000

The Workflow for Deploying Segment Routing according to this is the following: Configure the Segment Routing Global Block (SRGB) Enable Segment; Routing and Node SID on the IGP Configure Segment ...
0
votes
0answers
21 views

How to properly setup graceful-shutdown community

I'm trying to setup graceful-shutdown community but it looks I cannot make it working. community-set comm-graceful-shutdown 65535:0 end-set ! route-policy SOMEIX-IN ! tried set local-preference 0 ...
2
votes
1answer
179 views

How to save the initial startup configuration in IOS XR?

I'm willing to try all the Segment Routing implementations one-by-one in XRv 9000 Router. Each time I have a specific implementation for SR e.g., SR-TE, SR-MPLS, SR-OSPF, and SR-ISIS ... etc. The ...
0
votes
1answer
37 views

VLAN setup for three Servers [closed]

As per below, i have setup a VLAN for three servers. Do you know if this is correct?
2
votes
1answer
45 views

Cisco QoS trust and cos-dscp dscp-cos Mapping behaviors

Regarding our current Cisco QoS implementation, to get a deeper understanding I would have some questions I read this: https://www.cisco.com/c/en/us/support/docs/wireless-mobility/voice-over-wireless-...
0
votes
1answer
32 views

when to make a port dynamic desirable instead of trunk?

i'm reading CCNA stuff and just got stuck in this issue: i read some articles about DTP and trunking but didn't understand when to make a port trunk and when make it dynamic desirable ? in what case ...
0
votes
0answers
20 views

How to enable RESTCONF server in IOS-XR?

I aim to enable RESTCONF server on Cisco IOS-XRv 9000. I did not find online anything about enabling HTTP server in this IOS-XR version. However, with NETCONF server can be enabled. For IOS-XE is ...
3
votes
1answer
41 views

Can I limit bandwidth for certain IP address, subnet or VLAN on Cisco 881?

I have a router with several workstations running on the switched ports. I need to limit their WAN bandwidth. I tried to use rate-limit on Vlan1, but it looks like it had no effect. What is the ...
0
votes
1answer
38 views

Unable to configure SR-TE (Segment Routing Traffic Engineering) in CSR 1000v

I'm trying to configure SR-TE (Segment Routing Traffic Engineering) in CSR 1000v IOS XE 16 using the official tutorial in here Segment Routing Traffic Engineering (SR-TE) I have the same topology in ...
1
vote
1answer
31 views

What does the 'network w.x.y.z' RIPv2 command specify?

I'm studying networking protocols, and am starting with RIP. When configuring RIPv2, I see 2 pieces of information you need to relay to the router: Which interfaces to advertise RIP updates on Which ...
2
votes
1answer
30 views

How do I find out which NAT is getting hit?

I can see in packet captures that my packet's destination IP is getting translated. How do I find which NAT statement is responsible for the conversion if my device has over 200 NAT rules? I'm using ...
0
votes
0answers
50 views

Cisco 2960X stacked switches pop up ACL error messages without any ACL configured nor input

I have a few Cisco 2960X with the fiber flexstack modules, when I boot them up, I always got these message: 'Duplicate sequence number. Failed to add ace to access-list' These are brand new switches ...
0
votes
0answers
44 views

How Cisco Line Protocol works

How do Cisco Line Protocol works ? I could read this: https://www.cisco.com/c/en/us/support/docs/content-networking/keepalives/118390-technote-keepalive-00.html, about Ethernet Interfaces keepalive ...
0
votes
0answers
35 views

Subnetting different ip on same networks with different mask

I am a little confused with subnetting. Looking for a proper explanation. Suppose I have 3 routers A, B and C. Int 1: 10.0.0.1/30 <-- Router A Int 1: 10.0.0.2/30 <-- Router B Int 2: 10.0.0....
0
votes
1answer
48 views

Physical device in subnet of virtual networks [closed]

I was wondering if it's possible to connect a physical Raspberry to a NUC running several virtual machines on an ESXi environment. The network is setup as follows: I want my physical device to be '...
3
votes
1answer
585 views

MAC Address learning process

Does a switch learns hosts mac address in these following scenarios: Switch port configured as access and frames received tagged on different VLAN Switch port configured as trunk and frames received ...
0
votes
0answers
35 views

IPSec Tunnel is up but no Communication with End Systems?

I need help for IPSec tunnel. Currently, I am working on a small task to create remote access between my laptop and office router, in order to access the office LAN network. IPSec tunnel is working ...
0
votes
0answers
38 views

Basic connectivity won't work in Packet Tracer

I've been redoing this multiple times and I'm sure i configured it correctly, however there is nothing happening at all. It's just a basic network with 3 routers and OSPF configured. Here are the ...
2
votes
2answers
82 views

Please help me understand this simple arp request / reply - how does a router know an IP address without knowing the MAC address?

I am new to networking, I am using Wireshark on my home PC to learn about ARP. I understand that ARP is used to build the ARP cache, which correlates IP addresses to MAC addresses on a LAN. ARP ...
1
vote
1answer
30 views

How can i simulate MAC Flooding Attack in Cisco Packet Tracer on windows?

Is there anyway to simulate a mac flooding attack without using linux/Ubuntu? I have windows and i have to simulate on it. Is it possible to simulate on Cisco Packet tracer?
0
votes
1answer
23 views

Can more than one person work at the same time in Packet Tracer?

I want to know if more of one person can work in packete tracer at the same time. For example if a friend from her house and I from mine could work in the same proyect of packet tracer at the same ...
0
votes
0answers
35 views

Query on Cisco IPsec Licensing, HSEC-K9

I'm currently debugging an issue with IPsec tunnels and it seems like one of our client's NW engineers didn't install the HSEC-K9 license. The issue is that the new IPsec tunnels are not coming up ...
0
votes
0answers
49 views

Block internet on a Cisco catalyst 3560 port

Good day Is there a way to block a specific port in a Cisco Catalyst 3560 switch to block the user from accessing the internet but still have full access to the internal corporate resources. The ...
2
votes
1answer
27 views

Subinterface on Cisco ASA 5550 does not work with VLAN on HP ProCurve

I created subinterface on Cisco ASA 5550 (ver. 9.7.1): interface GigabitEthernet1/2.810 vlan 810 nameif dmz810 security-level 50 ip address 172.29.12.33 255.255.255.248 And VLAN 810 on HP ...
0
votes
0answers
4 views

Cisco Packet-tracer extended ACL [duplicate]

I want PC4 to ping PC5 but PC5 should't can ping PC4. My current config is: Multi Layer Switch: ip dhcp pool vlan10 network 192.168.10.0 255.255.255.0 default-router 192.168.10.1 dns-server 8.8....
1
vote
1answer
37 views

How to view/backup the 'ASA' config from a Firepower device?

We have some Cisco Firepower firewalls which we administer and generally in the past for ASA's we will review the config files locally on our machine, simply because it's easier than viewing it via a ...
0
votes
2answers
50 views

Get DHCP IP with subinterface

Router0 has 1 subinterface on gi0/0 and can't get a ip trough dhcp. Is there something I forgot? The configs: Router0(got no ip from dhcp): interface GigabitEthernet0/0 ip address dhcp duplex ...
1
vote
0answers
22 views

Cisco 3945 Switch and SM-D-ES3G-48-P service-module issue

Cisco 3945 Switch and SM-D-ES3G-48-P service-module comms issue Hi folks, Let me try and explain my situation. I have the 3945 switch and 48 port etherswitch module. The 3945 ios and config are ...
0
votes
1answer
35 views

Get DHCP IP from ISP

How can I give the interface gi0/0 on router4 a IP with dhcp from the router ISP_RECHTS? Current Config ISP_RECHTS config: ip dhcp pool EINS network 70.0.1.0 255.255.255.0 default-router 70.0.1.1 ...