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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HTTPS QOS and policing [closed]

In our office, everything runs on HTTPS. We have softphones and web-based clients which are high priority. We also have Google search, maps and other low priority websites that should work on best-...
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how to enable webgui after running auto-secure on ASR 1001-X Version 16.09.02

I've tried doing the following on the cisco web-guide but have gotten no luck in restoring the webgui after running auto secure. Thanks in advance
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cisco zone-based policy firewall

How to limit the number of established connections for each host, that connect to the service? In the policy settings, I found only blocking by the number of half open connections. parameter-map type ...
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2answers
116 views

What does the Cisco HTTP client (help to) do on a switch?

While checking for vulnerabilities in one of our Cisco switches I came upon this: CVE-2019-12665. Excerpt from the CVE: A vulnerability in the HTTP client feature of Cisco IOS and IOS XE Software ...
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Cisco Catalyst 9410 - Using Default Gateway versus ARPing for locally connected host

I may be missing something extremely simple here, but im at loss trying to figure out what this Nexus switch is doing. Here is the topology: DISCLAIMER! I had made a mistake on the diagram by ...
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215 views

How can I connect (stack) two Cisco SG350 together?

I am building a storage network, physically separated from the data network. I have two Cisco SG350-28P-K9 V02 switches: One on the basement. Has two NAS, two ESX servers. (in use) One on the 4th ...
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27 views

CISCO Packet Tracer

Does Cisco Packet Tracer support config memory and config network command? If no, then do enterprise routers still support it?
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41 views

Suitable Laptops

Not sure if this topic or question has been asked before but if I was to buy a 2019 top spec macbook pro, would instill be able to connect to Cisco devices, I'll be running windows on it as well but ...
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2answers
53 views

How to connect to the console router with limited length of roll-over cable?

Here is the full question: I have a roll-over cable with length only 5 m and I want to connect it to the console of the cisco router that is 20 m far. How can I solve this?
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3answers
153 views

How to exclude interfaces without description on 'sh int description' command using regex?

[Cisco IOS-XE] [4507R+E] How to exclude interfaces without description on 'sh int description' command using regex? Couldn't find any related/previous questions.
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34 views

Jumbo frame problem when using switch

I have two GigE cameras. I use 4 frame per second for capturing. Each frame of first camera is 2.3MB. Each frame of second camera is 1.8MB. So in a second I use 4 * 4.1 = 16.4 MB = 131 Mb of bandwidth....
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368 views

Cisco ASA IKE Receiver: Runt ISAKMP packet discarded on Port 500

I have lots of ikev1 tunnel running on our production Cisco ASA5585 and today i have configured ikev2 tunnel for one of our new customer and i have started seeing following error, and not sure what is ...
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Cisco ASA Security Warning: Untrusted server cert after asa crash and reload

We have Cisco ASA 5505 working VPN anyconnect and it's been almost 1 year no issue, but last week it got crashed and reboot itself and after that we found it started throwing warning like following: ...
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Parameter Map vs IP SLA

What is the difference between parameter map and ip sla? In both we can specify that if threshold of something is crossed then a log is generated and based on that some action can be taken. Has one ...
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Possible to change VTY password 7 to secret 9

The version I have Router1#sh ver Cisco IOS XE Software, Version 16.09.02 . Router1#sh run | sec vty line vty 0 4 password 7 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX login authentication ...
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Brocade/Ruckus per vlan spanning tree vs Cisco

Brocade = (config-vlan-10)#spanning-tree rstp This seems to enable rstp per vlan. This example enabling it on vlan 10. Cisco = spanning-tree mode rapid-pvst This enables Rapid PVST+ under the covers ...
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699 views

How to change a usernames password to secret without deleting username

Router1(config)#username admin privilege 15 algorithm-type scrypt secret xxxxxxxxxxxxxx ERROR: Can not have both a user password and a user secret. Please choose one or the other. Router1(config)# I ...
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16 views

RTO timer in EIGRP

Does EIGRP function like this - A packet is sent and the sender waits for acknowledgement. If it gets an acknowledgment, then it updates SRTT timer along with Sequence Number. If it doesn’t get any ...
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Adding legacy AP firmware to new WLC

At work I've stumbled into this task where I needed to update our virtual WLC from 8.1.133 to 8.10.2.2. However in addition to new APs (9120) there are still APs (2702) in use that are not supported ...
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2answers
176 views

Nexus 6001 How to find source of STM_LEARNING_OVERLOAD

Several time ago I've foud that NX-OS sends STM_LEARNING_OVERLOAD EET: %FWM-4-STM_LEARNING_OVERLOAD: system experiencing unusual number of new address notifications - deferring learn notification for ...
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1answer
30 views

Why do we need EIGRP AS numbers when we have EIGRP RID?

I understand that the EIGRP routers need to have the same AS number to peer with each other. But why can't we just use EIGRP Router ID?
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23 views

Cisco 7960 CTL File Encoding

When booting my 7960 phone, I am getting all of the correct files. However, in trust list (CTL File), the IP addresses are incorrect. They are the ASCII characters of the actual IP address. Therefore, ...
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1answer
69 views

Connect 2 VLANs on Cisco SG300 with cable

I have a Cisco SG300 with 2 VLANs enabled, half the switch ports are on one VLAN, half is on the other. Both VLANs use the same subnet. I want traffic to travel between the 2 VLANs. I thought the 2 ...
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1answer
171 views

Cisco ASA looping broadcast packet

I have small office where running cisco ASA ASA5506 and version 9.4(1) and it's also configured for IPsec VPN tunnel, My LAN subnet is 10.1.1.0/24 So i have found very interesting things in LAN ...
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1k views

how to factory reset ASR 1001-X

So I was setting up/testing this router. While using auto-secure during the auto-configuration. {Router#setup...} Once I get through auto setup and reloaded. I was not able to login. I did some ...
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1answer
165 views

Cisco dVTI - Virtual-Access interface has no IP address

i'm struggeling with some dVTI Issue on a Cisco ASR1000 box. here is my configuration for the hub site: crypto keyring FOO-KEYRING pre-shared-key hostname r2-foo key iawg8b32hah ! crypto isakmp ...
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2k views

How many stack cables would be needed if we want to stack two 3850 switches

How many stack cables would be needed if we want to stack two 3850 switches : We have one 3850 switch and planning to add one more. So my guess is only one Power & One data stack cable would be ...
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1answer
64 views

Vlan Command Issues on Cisco Switches

I'm new to cisco equipment. I have GNS3 emulating an L3 switch whose image is "i86bi-linux-l3-adventerprisek9-15.5.2T.bin". I want to create a cable network with 802.1x and vlan authentication. For ...
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1answer
177 views

Is it possible to make a telnet connection between a client and a server on Cisco Packet Tracer?

I wanna capture telnet packet with such a simple client-server topology. There is no configuration under Services on the server-side. I tried to telnet to the server on Command Prompt with: C:\>...
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93 views

High Availability in Cisco4331 with sync feature

Few weeks ago i had asked help regarding the High Availablity in Cisco 4331 and recently i managed to sort it out with the help i got here. Here is the link to it: High availability confiugration in ...
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2answers
27 views

'Flat' FlexVPN Network Design with multi gateways [duplicate]

The use case is a meshed ip radio network where the radio's move around alot. Multiple gateway's (FlexVPN Spokes) are statically located to re-bridge the meshed radio network when the radio's travel ...
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111 views

'flat' network design

Is it possible to have a Hub and spoke FlexVPN setup where every spoke has the same LAN subnet. I need to configure 6 spokes with the same subnet at each node., I was thinking NAT but I need to access ...
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1answer
37 views

BNT Layer2/3 Switch & Cisco SG200 VLAN

I'm trying to set up a VLAN for my staging environment, but I'm having trouble. Here's my network layout: +--------------------+ | [1] [2] [3] [4] | Ubiquiti USG-PRO-4 +--|----|----|-------+ |...
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1answer
158 views

Unable to see packet drops on tunnels

I have the following topology set on AWS where there are 4 CSR 1000v Routers deployed and Segment Routing enabled in which the Segment Routing Headend is R1 and the destination is R3. I aim to send ...
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1answer
72 views

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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551 views

Cisco ASA IPsec tunnel QM FSM error

I am setting up Cisco 5585 ASA for IPsec tunnel with one of cloud company. we already have lots of tunnel for various cloud provider and life if good but recently this tunnel giving me hard time to ...
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1answer
249 views

VLAN routing over multiple routers(RIPv2)

I am currently working on a scenario to get a better understanding of the RIPv2 routing protocol but am currently stuck. Please see my picture below to get a better understanding of what I am trying ...
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1answer
178 views

Will OM4 Fiber Work with my 1GbE Fiber Transceiver?

What is the fastest cabling that can be used to connect the transceiver that Meraki calls the 1GbE SFP SX Fiber Transceiver? Source: meraki.cisco.com/products/switches/accessories I'm trying to ...
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1answer
65 views

configure IPv6 ACL on interface WS-C3750X-48

I am using  WS-C3750X-48 model switch. license is lanbase. I have activated cmd on my switch: sdm prefer dual-ipv4-and-ipv6 routing. Then i did reload. After that, i will able to config IPv6 on ...
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1answer
129 views

Cisco LAP1142, usable without WLC ? Alternatives to a WLC device?

The title pretty much says it all. A charity I volunteer for was given a whole bunch Cisco 1142 ligth-weigth AP's. (A demolition guy pulled them from the building he was taken down and donated them.) ...
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1answer
162 views

Scheduled reload Cisco 3750X Slot

I received a new Stackwise cable to make my switch stack of 5 Cisco 3750x's now fully redundant. Upon connecting the new Stackwise cable, I found that the switch did not recognize the new cable. I ...
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1answer
113 views

What is the meaning of `secret 0` in Cisco config?

I've been reading about this here and found the following config in it. What is the meaning of the following lines? privilege 15 secret 0 Router# Router#config t Router(config)# Router(config)#...
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1answer
115 views

`no ip bootp server` appear in `sh run`

My understanding on Cisco devices is if we put no command in the config mode, that particular line will be gone from sh run. But I notice there is specific line in sh run with no ip bootp server ...
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2answers
591 views

High availability confiugration in Cisco 4331 routers

I need to configure high availability for 2 Cisco 4331 routers. First i was planning to configure using HSRP but later i realized there is another way around called as "stateful Interchasis Redundancy"...
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1answer
54 views

Cisco IOS RA VPN with internal NAT

We have a Cisco 871 setup with a remote access VPN which works fine. However we now need the RA-VPN to be able to access an IP on the LAN which only speaks with an authorised subnet. IP addresses as ...
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1answer
54 views

VLAN Across Trunked CISCO 2960-S Switches

With reference to the above diagram: Is 10.124.124.141 supposed to be able to ping 10.124.124.161 if the setup is correct ? There is no router in-between, the idea is that the VLAN 215 spans two ...
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3answers
96 views

Regarding Cisco's hierarchical network design

why routed ports usually implemented between the distribution layer and the core layer ? why not just extend the layer 2 domain to the core layer ? is the other design model more practical than this ...
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1answer
45 views

Router RIPv2 displaying subnets not directly connected

Is there a way to show subnets on "Show IP route" that aren't directly connected, but are a hop or 2 away? Is this with Router RIPv2 "redistribute" or is there another way? Thanks
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1answer
99 views

Upgrading Cisco 819 to 809, can I connect devices to 2 routed ports and be on same subnet?

The company I work for has multiple remote "IoT" style sites connected back to the datacenter via a Cisco 819 cellular router. We are in the process of upgrading these to the newer Cisco IR809 routers ...
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2answers
404 views

Router on a stick not connecting 2 different VLANs

I have a setup which requires two different VLANs to be able to ping one another. I have a setup with 2 - layer 2 switches and a router that has defined sub-interfaces, and for the life of me, I ...

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