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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.

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16 views

cisco zone-based policy firewall

How to limit the number of established connections for each host? In the policy settings, I found only blocking by the number of half open connections. parameter-map type inspect DoS max-incomplete ...
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2answers
45 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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1answer
44 views

Cisco Nexus 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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1answer
32 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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13 views

Hostname resolution on cisco packet tracer [closed]

I was configuring hostname resolution with DNS server on cisco packet tracer. I created the records and assigned ip to them then I configured everything on Router with ip domain command but the ...
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16 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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25 views

Dual FlexVPNs with VRFs on a single router

I'm trying to achieve a double wrapped VPN using a single router at both ends. (Tin foiled hat customer) My current chain of thought is HUB |global routing table >Internal VPN> VRF BLACK > ...
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1answer
36 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
36 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
56 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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1answer
28 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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28 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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11 views

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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1answer
9 views

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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0answers
23 views

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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1answer
26 views

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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31 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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8 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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19 views

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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1answer
31 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
19 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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12 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
19 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
28 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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1answer
39 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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14 views

MLAG with VRRP on ASR1K-HX

I have two ASRs connected to each other and configured Multichassis LACP. LAG from an external switch to each ASRs. I am looking for a solution on how to enable VRRP into the ASRs since I do not have ...
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1answer
51 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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0answers
17 views

Mainframe OSA-Cisco(ACI) flaping

anyone dealing with Mainframe OSA(multiple) connecting to Cisco ACI--issues with FLAPING
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21 views

Getting less pings received than expected when using port mirroring

I have put port monitoring on a cisco 2960 switch Switch(config)#monitor session 1 source interface fastEthernet 0/1 - 23 rx Switch(config)#monitor session 1 destination interface fastEthernet 0/24 ...
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44 views

Limited bandwidth only when switch is connected to router

I have a very strange problem in my network. My computer is connected to a switch (Cisco SF300-08, 100Mbit). This switch is connected to a dual wan router (Cisco RV320, 1Gbit) and this router is ...
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2answers
1k 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
44 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
26 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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0answers
35 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
21 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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2answers
48 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 ...
0
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1answer
22 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
148 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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0answers
15 views

Why won't Cisco Catalyst 1760 Router enter rommon?

I have purchased a Cisco Catalyst 1760 Router. It has the password recovery turned off and there is no reset button. I am using ctrl+break in putty on windows to break and it has given me the question ...
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1answer
34 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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0answers
28 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 ...
1
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1answer
40 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
118 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 ...
2
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1answer
56 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
18 views

Cisco PT, Subnets overlapping? [duplicate]

I was just making up a scenario with three Routers connected to each other and a switch connected to each router, to then configure VLANS and Router-on-a-Stick. An image of this should be attached ...
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1answer
63 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.) ...
2
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1answer
53 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 ...
1
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1answer
45 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
33 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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0answers
24 views

MLS qos bridged directions

I'm working in a cisco environment and want apply some QOS. But it is not clear for me when you add the 'mls qos bridged' command to an SVI what direction input is and what direction output is (I'm ...