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.
3,745
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CCNA OSPF Loopback as the router ID
FYI, I am studying for the CCNA and new to this.
The scenerio, 2 routers R1 and R2.
R1 Loopback IP as 192.168.0.1
R2 Loopback IP as 192.168.0.2
Using the loopback IP's as the router ID.
I provisioned ...
- 1
1
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0
answers
42
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Globally raise IP ARP inspection limit rate on Cisco
I am trying to raise the ip arp inspection limit rate from the default rate of 15 on my Cisco 9300 since I am getting to many %SW_DAI-4-PACKET_RATE_EXCEEDED: x packets received in xx milliseconds ...
- 121
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1
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65
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Cisco ports shutting down temporally due to arp-inspection
We have a couple of Cisco 9300 switches. We had the switch configured using STIGS. A couple users have complained that their Avaya phones restarted. I started running the show logs and noticed the ...
- 121
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2
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321
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Cisco Console Port to 1 Port Ethernet Breakout
I was thinking about making it a bit easier to access the console port on a few switches deployed at work. Basically these switches are located top of rack above a KVM, and this makes accessing the ...
- 243
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40
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MPLS labels for BGP prefixes
I've just started studying about MPLS and the labels it uses and this was mentioned in my study resource.
When we use LDP on Cisco IOS, we locally generate a label for each prefix that we can find in ...
- 759
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vote
1
answer
83
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Why are 10.3(99w)F and 10.3(99x)F NX-OS named like that?
According to https://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/nx-os-software/guide_c07-658595.html#TypesofCiscoNXOSSoftwarereleases the part in brackets - "99w" and "...
- 113
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1
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40
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Recover Aironet AP-ESC doesn’t seem to break c2602 boot sequence
I am trying to reuse an old Cisco Aironet c2602 Autonomous AP; I need to reset the password. CCO instructions say that I need to hit ESC repeatedly while I am on the console during the AP boot ...
- 29.9k
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2
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59
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Inter-VLAN using L3 switch
There are 3 VLANs 10, 20 and 30 on these switchs. Everything such as VTP, DTP are working fine. The problem is that inter-VLAN seems not to work correctly. IP routing is activated on the L3SW (even ...
- 27
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1
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37
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Non VLAN Tagged Traffic Not Going Through Trunk Between Cisco Switches
Good day all.
I am running through a packet tracer exercise and am stuck on where to go next. Forgive me if I am missing something obvious, I have not touched any cisco networking or networking in ...
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1
answer
36
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What is the recommended destination public IP for Cisco IP-SLA?
I want to implement Cisco IP-SLA, but I am not sure what the destination IP I should use. Any recommendations or advice?
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Cisco WDS, FreeRadius and LEAP
Freeradius got rid of LEAP since some pointrelease of 3.2.x, and I'm stuck configuring Cisco WDS on their Aironet series.
Since forever there was a tweak with LEAP in Cisco configuration like this:
...
- 233
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19
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Unable to connect to the router using ncclient on RedHat 9.0 on IBM PowerPC
I have a simple program using netconf client version ncclient 0.6.13 with Python3 running on PPC64LE Red hat Version Red Hat Enterprise Linux release 9.2 (Plow)
which is using netconf yang to connect ...
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votes
1
answer
30
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IPv6 subnetting with different end device requirements
`I have three main buildings with building A with 242 end devices, building B with 54 end devices and building C with 894 device. And all the routers are connected to each other like ring topology. ...
- 61
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1
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138
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CISCO 9800-L Controller internal dhcp not working - GUEST WIFI
I have been trying to configure a guest network for my Cisco Catalyst 9800-L Wireless Controller for some days now. For the guest network, i want it to use an internal dhcp on the controller. I have ...
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1
answer
36
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Cisco CP-7841 IP Phone backlight settings not working [closed]
I have a couple of Cisco CP-7841 IP Phones that are working otherwise well, but the backlight controls are not working. I would like to have the backlight off unless the phone is being used (IIRC this ...
- 11
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1
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65
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The Use of BGP Communities
I am studying BGP communities at the moment.
I understand that communities are path attributes which are a way of tagging specific BGP route advertisements in order to ensure proper route selection ...
- 759
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vote
1
answer
33
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RIP v2 Network Command
I am comparing the Boson ExSim Lab to the Neil Anderson's Lab on RIP.
On one of the labs on Boson ExSim, it asks to configure RIP on the routers, all of which are on some form of a 192.168..0.0/24 ...
- 11
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1
answer
46
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Cisco Certificate CA Server and SCEP - adding RADIUS authentication
I am running a CA server on a Cisco ASR1k Router for several years. until now the number of SCEP clients is quite small (below 10) that it is possible to restrict SCEP Downloads by implementing a ACL.
...
- 497
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votes
2
answers
23
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RMA'ed device configuration [closed]
Just wondering what are the methods that you use when re-configuring an RMA'ed device.
Do you manually configured all the script that runs on the device or is there any efficient ways configuring the ...
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2
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113
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What Does Exactly Happen When A Switch Is Connected To A Portfast Port?
I am trying to get a thorough understanding of what does happen when a switch is connected to a portfast port on another switch that is part of a stable STP network in case of:
1- the port has no ...
- 285
3
votes
2
answers
159
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OSPF Advertise only loopback not transit VLAN
I have this topology:
and this configuration:
R1
interface Loopback0
ip address 10.0.0.1 255.255.255.255
ip ospf 1 area 0
interface GigabitEthernet0/0
ip address 192.168.0.1 255.255.255.252
ip ...
- 399
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votes
1
answer
40
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logging host 1.1.1.1 on Cisco C9300
My Catalyst C9300s running IOS-XE have logging host 1.1.1.1 in the config by default. Is that because it is sending logs to it's internal logs store? I can't seem to find a straight answer in the ...
- 461
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42
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Why Fast Ethernet port in Cisco Packet Service is always down?
I built a simple network simulation with Cisco Packe Tracer. I am not able to understand why fast ethernet port Fa0/0 on server Gmail and correspondent port on Router2 are always down. I checked and ...
0
votes
1
answer
147
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Cisco Nexus vPC Portchannel issues
I'm currently facing a network issue between Cisco Nexus 93108 (9.3.11) on an LACP port-channel configuration.
The replica below help us to reproduce the issue we had (using 4x Nexus 9000v qcow2 image ...
- 101
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votes
1
answer
41
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How to configure IDr on Cisco ASA for AWS IPsec tunnels
I am currently facing an issue while attempting to establish IPsec tunnels between AWS and a Cisco ASA firewall. The AWS tunnel logs indicate that the Identity Resolution checks are failing, ...
0
votes
1
answer
228
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Cisco NX-OS Factory Reset
An easy question actually. How do I do a Factory Reset on NX-OS? That means, how do I completely and permanently wipe all the configuration I've made without deleting the operating system image? There ...
- 1
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votes
2
answers
71
views
Can we have two logging source-interface configured on Cisco Switch?
I would like to understand if its possible for us to have two logging source-interface configured on Cisco Switch:
logging source-interface vlan1 (For syslogs)
logging source-interface vlan2 (For ...
- 57
1
vote
1
answer
256
views
Cisco interface vlan (shutdown vs no ip address)
What is the difference in functionality between these two commands.
interface Vlan10
shutdown
interface Vlan10
no ip address
I haven't been able to find any source material, but I've seen other ...
- 113
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0
answers
23
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Gain using single antenna on Aironet 4x4 MIMO device
I'd like to configure a CAP-3602E in order to use with a single element grid antenna.
I assume that when I'm in full 4x4 MIMO mode (all antenna ports enabled), if I have Tx power set at 23dBm, each ...
- 103
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votes
1
answer
55
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DMZ cannot send traffic to INSIDE (Cisco ASA 5505)
Have a nice day, everyone.
I have a question while working with Cisco ASA 5505 firewall. I want to create a interface/VLAN for DMZ. To do this:
int vlan 3
no forward interface vlan 1
nameif dmz
...
- 27
1
vote
3
answers
63
views
Is there a comparable technology to Cisco's DTP from other network vendors?
Is there a substitute for Cisco DTP technology from other vendors? And if so, which ones?
Didn't find anything on google.
- 11
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1
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27
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Web Access Certs No Secure Though It Is
I have a Cisco C9300 and I am securing the access to the web console to it with the HTTPS server. I created a trustpoint for our CA and imported the CA cert as well as created a certificate for this ...
- 461
1
vote
2
answers
492
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Breakout from 400Gbps to n*25Gbps
My servers are currently have 25Gbps NIC, but switch ( Cisco Nexus 9300 series) has only 400Gbps.
I would like to be able to break out the 400Gbps connection into four 25Gbps connections. Is this ...
- 115
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0
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30
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cisco business dashboard probe scanning outside of given range
we're deploying Cisco business dashboard with dedicated probe server in our LAN.
I've managed to make everything work, but one thing bothers me.
I configured the probe managed network to only discover ...
- 1
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votes
1
answer
56
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NAT configuration behind pppoe with virtual server
my CISCO 3925 router is handling pppoe, NAT, and DHCP server..
My local LAN is 192.168.1.x and it's behind that NAT.
I'm trying to enable access to a DNS server that's on this LAN (192.168.1.191 tcp/...
0
votes
1
answer
82
views
Can I update a Cisco RV320 v03 to v04?
I bought a Cisco RV320 dual-WAN Gigabit VPN router that keeps freezing after about 12 hours or so of use. On the System Summary page, it shows that it is a RV320-K9 v03, firmware version 1.3.2.02. I ...
- 3
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votes
1
answer
198
views
HSRP and DHCP problem
I have 2 layer 3 switches DS1 and DS2. There are the same VLANs but different IP addresses on VLAN interfaces.
On DS1:
VLAN 10: 192.168.10.1/24
VLAN 20: 192.168.20.1/24
On DS2:
VLAN 10: 192.168.10.2/...
- 27
1
vote
1
answer
52
views
Cisco 4500x configure fast-hello interface with multiple ports
I have a pair of cisco 4500x-32 and i configured VSS between then but i am using just 1x 10G interface for fast-hello packet and here is that interface configuration:
interface TenGigabitEthernet1/1/2
...
- 577
0
votes
0
answers
69
views
MODBUS TCP server with CISCO C-9300
I am planning to use the MODBUS TCP Server with the C9300 switches. Yet, I found the following guide:
CIP and MODBUS Configuration Guide, Cisco Catalyst IE3x00 and IE3100 Rugged, IE3400 Heavy Duty, ...
- 5
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1
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59
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Cisco triangle network with static routing not working
I have this network
when the network tries to communicate with the routers it fails.
I have already tried everything in my power without success.
how to assign ip addresses in routing
I have been ...
- 1
0
votes
1
answer
41
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Connect site-to-site private networks [closed]
I used VPN to connect site-to-site private networks from A to B. It worked fine. Then I used NAT for (1) hiding private networks and (2) LAN of 2 sites could access the Internet. The problem is that ...
- 27
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votes
1
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164
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What Is The Difference Between OSPF Neighbors And Directly Connected Routers?
I have read somewhere that:
OSPF router’s neighbors are usually the routers directly connected to
it through its interfaces, from a layer-3 perspective. However, there
are some exceptions, such as ...
- 285
0
votes
1
answer
144
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Best Practices for Configuring Port Security on a Layer 2 Switch
How to configure port security on trunk and interfaces
I'm learning about port security and have a few questions. I have a layer 2 switch with interfaces f0/1-22 in access mode to access VLANs, ...
- 27
1
vote
1
answer
58
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Understanding the Role of Member Device in Cisco 3850 VSS Stack
Clarifying the Role of Member Device in VSS Domain Configuration
I am trying to understand the role of a device in a VSS domain as a "member."
What does it mean for a device to be a member?
...
0
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0
answers
28
views
How to allow cisco to log on to a specific ip port using nat
Good afternoon, I use Cisco 7201
I create a network on the gi0/0 interface connecting to a dhcp provider and get a static ip address, also on the gi0/1 interface I create a network where my 5 servers ...
2
votes
2
answers
75
views
Cisco IOS - how can I make the guestshell be reachable via VRF?
I am currently trying to set up a cloud application on the guestshell of an ISR4331. It installs a connector that needs to have connectivity to the internet. I assume the issue is not specific to what ...
- 163
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0
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64
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Configure DHCP snooping with no option 82 on a pure layer 2 Juniper ex2300 using ELS
I have a Juniper ex2300 switch in a mostly-cisco environment (no MIST). On my cisco devices, I have DHCP snooping configured per vlan, with option 82 disabled on the access-layer switches because they ...
0
votes
2
answers
77
views
Hide private IP address
DS has 7 VLANs and 7 DHCP pools respectively. There are 3 trunk links to 3 access layer switchs to share VLANs. Its VLAN interfaces and DHCP pools:
ip dhcp pool vlan10
network 192.168.10.0 255.255....
- 27
0
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1
answer
28
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what is the relation between DTP and VTP?
the ideas behind VTP & DTP are different, then why do we need to make sure that the VTP domain on both sides is the same otherwise the DTP will not work?
- 11
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votes
1
answer
30
views
ACLs block connection
Here is my configuration on ISP router:
interface GigabitEthernet0/0/0
no ip address
duplex auto
speed auto
!
interface GigabitEthernet0/0/0.10
encapsulation dot1Q 10
ip address 192.168.10.1 255....
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