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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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1answer
4 views

Unable to use HTTPS Managment “API” on Cisco ASA 9.12

After upgrading a Cisco ASA to code version 9.12(1)3, I am unable to reach the HTTPS management interface, which we use for many automation tools. Example curl that is functional in prior code (9.8 ...
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2answers
27 views

What are metrics to measure the load in Cisco Routers

I have a setup of Cisco CSR 1000v routers. I established a GRE tunnel between 2 routers, where the tunnel's source is the GigabitEthernet1 interface. I aim to measure the load on that GRE tunnel. The ...
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0answers
11 views

Can't Find Latest Firmware for CiscoLinksys SLM2048 Switch [on hold]

How can I get get the latest firmware on a obsolete Cisco switch? Specifically, even though the CiscoLinksys SLM2048 is retired equipment, I have one that still works well, and I'd like to install ...
3
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1answer
19 views

SG3xx Password Reset/Recovery

Trying to reset a password for a number of switches I have. Didn't save the text file I had jotted it down in....of course. Connected via serial, but cannot seem to locate any concise info on ...
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0answers
16 views

IS-IS as a PE-CE routing protocol

In case of IS-IS as a PE-CE routing protocol for MPLS VPNs , when route is redistributed from BGP to IS-IS , does 'Down Bit' is also set to avoid routing loops?. Background Information We know that ...
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0answers
18 views

MPLS monitoring [on hold]

the question is that there is a network using Cisco, HPE, Mikrotik devices with MPLS L3VPN backbone (OSPF, LDP, MBGP). I can not understand how to monitor LSP paths, as well as client VPNs (to ...
0
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1answer
37 views

Cisco nexus 9396PX TX output discard on 40G interface without link congestion

We have cisco nexus 9396PX with N9K-M12PQ module (12x40G Interface), We have 8x10G L3 LACP bonded connectivity with our ISP and so far so good no issue at all. but recently we migrated that LACP LAg ...
6
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1answer
1k views

Cisco 3750X Power Cable

I received a Cisco 3750X the other day. I went to go plug it in for testing and found that the standard three prong female power connector is no longer compatible with the power supply. Cisco has ...
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2answers
82 views

Why my simple standard ACL outbound doesn't block the gateway's traffic/ping of the VLAN's SVI?

I am using a router/switch Cisco C1111-8p with IOS XE 16.8. I have 3 VLANs: 1: native/management 20: dev 50: Guests I'd like to block Guests/VLAN50 to communicate with anybody else but Internet. ...
0
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1answer
31 views

Multi Area OSPF configuration in cisco packet tracer

I am a bit confuse in the concept of multi area ospf. I posted 2 days ago. And I was asked to leave the one interfaces of each router out of the circle. Now the center circle is area 0. The top circle ...
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0answers
9 views

Multiple DHCP servers detected by access points [closed]

I’m having an issue with our internal network and voip network. I currently have it setup as a non-converged network separating our two data switches and one voip switch. We preferred not having our ...
1
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1answer
29 views

Suppress CLI terminal output on IOS

I would like to know if we can suppress certain lines from being displayed on the CLI. Example: I call following TCL script, that in itself calls some other scripts. What i Get on the screen is this: ...
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0answers
47 views

Routes stopped redistributing through OSPF

I was entering a number of secondary addresses on some VLANs. In total there were 10 secondary addresses added. The subnets added were from three publically routable /24s (I will call them 25.0/24, ...
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0answers
13 views

Cisco Packet Tracer - How do I connect these networks through a router? [closed]

I am trying to connect these two switches through the router as shown and also correctly configure the wireless router on each network so that they connect to their switch. Basically anywhere there's ...
2
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1answer
64 views

NAT and two internet providers, how to configure failover

Will you please help me to setup ISP2 as a failover internet provider. Configuration as follows: ip source-route ! ip cef ! no ip domain lookup no ipv6 cef ! multilink bundle-name authenticated ! ...
0
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1answer
47 views

What can I use to block all the ports of the WAN in a Cisco router?

I have set up my small network using Cisco ISR C1111-8p and a Cisco Wireless AP C1832i. What can I use to block all the ports of the WAN? Is there any security advantage blocking them rather than ...
7
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2answers
430 views

OSPF increase bandwidth with load-balancing

This is my current setup where i have 40Gbps links between all 4 switches running OSPF using L3 links between them but now i want to double my bandwidth between switches so i am planning to add (...
0
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1answer
65 views

Getting the IP Address from a device

I got some kind of "router" from another department and they want to know the IP address. I connected it for "testing" purpose on the switch at our place. I know the switch and port its connected to ...
2
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0answers
32 views

What does “l2protocol peer x” exactly do?

i'm struggeling with some Layer2 Service within one of my customer's MPLS networks. My aim is to provide a L2VPN Service between two ISR4000 Boxes that act as CPE in my MPLS platform. This L2 Service ...
2
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1answer
64 views

How to prevent manual assignment of an IP of VLAN/subnet A when connected to a VLAN/subnet B?

I'm configuring a Cisco router C1111-8p using IOS XE 16.8 with 3 VLANs. VLAN 1: native/management 192.168.0.0/24 VLAN 10 : 192.168.10.0/24 VLAN 20 : 192.168.20.0/24 I haven't set ACLs up yet but ...
1
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1answer
39 views

Configuring routers on Cisco

If I have three routers R1, R2, and R3 that are interlinked, then when configuring, do I have to give the command: description Link to R2 description Link to R3 when configuring R1?
1
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1answer
38 views

Does CSR1000v on AWS support IPv6?

I'm trying to implement Segment Routing IPv6 (SRv6) in Cisco CSR1000v on AWS. I'm having issues with IPv6 which gave the impression that IPv6 data plane does not work. Similarly, I configured a ...
1
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1answer
45 views

Cisco IOS Version changes for SNMPv3 server-group context

I'm trying to understand switch mapping using SNMPv3. It's come to my attention that the group(user) who is authenticating needs access to thecontext for mapping out VLANs. I've figures out this can ...
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0answers
23 views

Cisco APIC “Error executing command, check logs for details”

I have connected to a spine via Cisco ACI using SSH and notice that command executed in it will be ended with error message "Error executing command, check logs for details". May I know why? Would it ...
3
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0answers
35 views

Cisco nexus 9396 rebooted with reason xbar_client

Today my one of cisco nexus 9396PX switch got rebooted and this is what i found, based on following logs what could be wrong? We don't have Cisco support for this switch, trying to see if i can get ...
4
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1answer
62 views

Finding the root cause of Spanning-Tree recalculations (on Cisco Nexus 9000s)

I have a nagging Rapid PVST problem on some Nexus 9000 switches. Rapid-PVST keeps recalculating 3 to 5 times an hour. We have in this topology (summarized): Edge Router ...
1
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0answers
35 views

Cisco nexus spanning-tree logging to syslog

I am trying to send my spanning-tree events to remote syslog but somehow it doesn't work, This is what i have in my config. N3K# sh run | grep logg logging level spanning-tree 7 logging server 172.29....
3
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2answers
63 views

Trust dscp command missing on cisco 3850

We have an incoming QoS configuration on our 2960X switches like this: class-map match-any QOS_GL_TRUST match ip dscp 8 16 24 32 46 class-map match-any QOS_GL_CITRIX match access-group name ...
1
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2answers
39 views

CISCO ISE COmpactibility with 2960 Switch

I Was checking the switches which are compatible with Cisco ISE solution, from their site i saw that they support Catalyst 2960-S but in my environment i have 2960-24TC-S, I would like to know what if ...
2
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1answer
58 views

spanning-tree port type edge trunk on port-channel vs physical interface

If i configure spanning-tree port type edge trunk on physical interface instead of port-channel does that work? Or i have to do spanning-tree port type edge trunk on port-channel ? Example: ...
2
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1answer
38 views

Cisco ASA rekeying

Good day I was hoping someone has seen this before, I have a ASA5520 that has a l2l tunnel to a Palo Alto firewall. Every 2 mins the the logs I see a rekey I have check our configuration and we have ...
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0answers
16 views

Cisco APIC command equivalent to Cisco IOS `sh term | i Len`?

In Cisco IOS, the command to view current terminal length is s ter | i Le or show terminal | include Length Cisco_IOS#s ter | i Le Length: 44 lines, Width: 157 columns Cisco_IOS# Unfortunately, ...
1
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1answer
19 views

Cisco swtich stacked NTP configure

I have two cisco switches (WS-C3850-12XS-E) stacked by stack cable. I want to configure ntp on them. How to configure ntp on those about time synchronization?
0
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1answer
78 views

Does vPC peer-gateway cause unicast flooding

This is my network topology where I have SW-1 is configured for HSRP for multiple VLANs, SW-2 & SW-3 connected to SW-1 using vPC. Last few month I am dealing with this unicast flooding where ...
3
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3answers
472 views

HTML folder located within IOS Image file?

I have two 3750G switches in a Cisco switchstack I wasn't sure if this was common at one point or not, but when I go to copy a new IOS image .bin onto flash, It is showing not enough space. Upon ...
2
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0answers
30 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 ...
3
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3answers
384 views

Collision domain question

I'm studying for my CCENT exam, and not quite sure why the book (official Cisco) says that there are 5 collision domains in this example. Isn't it supposed to be 4? The hub on the left, the hub in the ...
1
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1answer
49 views

No MAC address table shown on Cisco switch

I'm studying CCNA1. following netacad course notes and sending "show mac address-table" to a switch (in packet tracer) I should get a list of the available MAC addresses. I only get the table header ...
2
votes
1answer
65 views

VTP does not update VLANs in switch

Switch 1 will be server and Switch 4 will be Client! Switch 1 configuration S1#show run Building configuration... Current configuration : 1451 bytes ! version 16.3.2 no service ...
1
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1answer
32 views

Can i run scanner on cisco packet tracer network

Can i run scanner on Cisco packet tracer network? It will be ideal it scanner will be nmap
1
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0answers
49 views

Swapping routers resulting in ARP issues?

A day ago I tried to swap out a router with a Meraki MX-84 Gateway in order to test the Meraki's VPN functionality. I set the static IP configuration on the MX-84's Internet interface to be the same ...
1
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1answer
38 views

QoS - Add DSCP EF tag with L2 switches?

Here is the topology that I have: Phone => (access port) L2 Switch (trunk) => Router My goal here is to add an EF tag to the packets coming from my phones. Basically, if a packet comes in being in ...
2
votes
1answer
42 views

Static NAT - Cisco Packet Tracer

I have configured what I think is Static Nat on my "NAT Router". I have attached an image of my network topology. However when I test the connection between the server on the inside network and the ...
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0answers
20 views

Anyconnect Cisco 5505 VPN Group cannot Access Inside Network

Below is the Configuration to my Cisco ASA. I can connect to VPN but then trapped and cannot enter the inside network. ASA Version 9.2(4)27 ! hostname AwBTech-ASA domain-name awbtech enable password ...
4
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1answer
74 views

Cisco APIC command equivalent to Cisco IOS `show terminal | include Length`

Whenever I run show running-config leaf/spine from APIC, I notice that there is a pause which is --More-- at the end of the first page. What I'm trying to achieve is to disable that so that I can ...
1
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1answer
51 views

Configure Nexus N9K-C93180YC-EX

I am configuring a switch for the 1st time (Cisco Nexus N9000 Switch) to do some server performance testing in my lab. I have the serial console working and can log into the switch and run commands. ...
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0answers
47 views

Unable to ping from one computer to another

Below you can see the topology of my network in cisco packet tracer. What I am trying to do is ping B2-Guest from B2-Management. When I try to ping B2-Guest from B2-Management the packet is lost at ...
3
votes
1answer
67 views

Cisco - supervisor reset without disabling interfaces

After power loss we have an issue with supervisor on 4500~ cisco switch. Peer (slot: 3) information is not available because it is in 'DISABLED' state But interfaces that are in that card are ...
4
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3answers
111 views

Do I need to add something to support inter-VLAN communication?

In my network using Cisco router/SW C1111-8p, the native VLAN 1 is not connected and doesn't have IP. VLAN10 192.168.10.1/24 with vlan10 DHCP pool VLAN20 192.168.20.1/24 with vlan20 DHCP pool Both ...
2
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1answer
43 views

What do I need and where to setup 2 VLANs with a Cisco router 1100 series with a wifi AP Aironet 1300 series

I am struggling and I don't really know what I need to setup my network. I have a Cisco router C1111-8p (8 switch ports) and a wifi AP C1832. +---------------+ +---------...