Questions tagged [cisco-commands]
Used for questions about the commands for Cisco devices.
215
questions
0
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0
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24
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Cisco Aironet 2800i Mobility-Express missing option for conversion
I hope this is an easy one. I'm scractching my head as there are 10-20 articles on how to convert from a capwap firmware to mobilty express for 2800/3800 all using the command:
ap-type mobilty-express ...
- 1
-1
votes
2
answers
54
views
Can I get into configuration mode by command "config" instead of "configure terminal"?
I would like to ask: When I configure router or switch in for example Putty, can I get into configuration mode by command "config" instead of "configure terminal"? Or I need to use ...
- 1
0
votes
1
answer
52
views
Verify brand name of installed SFP on Cisco Switch
I know I can run the sh inv to view the SFPs model and Serial Numbers attached on a Cisco Switch.
Is there a way to verify the brand name of each SFP?
I have Cisco 9300 and 9606 switches.
- 1
0
votes
1
answer
35
views
Unable to configure Site to Site VPN between Cisco Router & Cisco ASA and permit SSH
I am performing configuration on Cisco ASA and Cisco Router from the packet tracer. I am attempting to allow the external network (172.16.22.100 255.255.255.0) to access the internal server which is ...
0
votes
1
answer
74
views
Mac-address identification through traceroute
i would like to know the command syntax to trace a mac address in a lan.
I'm experiencing some issue in quick localization of a device by using only that information,
I remember the use of 'traceroute ...
- 5
0
votes
0
answers
38
views
Need assistance with Cisco Firepower 5516X: Excluding a single IP from a specific Snort rule
I'm currently managing a Cisco Firepower 5516X device and have encountered a false positive for a specific Snort rule. Instead of disabling the rule for all traffic, I would like to selectively ...
- 1
1
vote
1
answer
517
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
0
votes
3
answers
926
views
Finding what interface a MAC address is assigned to
I am currently on a Cisco 9410 and I ran a "sh mac address-table | i 5619" and I received
" 13 fc3f.db4d.5619 DYNAMIC Po1".
I just need assistance with finding what port/...
- 41
0
votes
1
answer
353
views
Naming ASN something else than "default", Cisco IOS XR
I'm trying to configure a BGP and VRF (for a L3VPN) on a Cisco ASR9000 router, as per this tutorial.
I'm on the first section ("Configuring Multiprotocol BGP on the PE Routers and Route ...
- 1
2
votes
1
answer
607
views
How do you drop (or ignore or filter) all untagged traffic on an 802.1q trunk port?
This answer says "[a] trunk has optionally one untagged VLAN and many tagged VLANS."
I always thought specifying switchport mode trunk would drop untagged frames at that port, but that ...
- 167
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votes
3
answers
449
views
What does `switchport trunk native <n>` do when in `switchport mode trunk`?
According to this article Cisco recommends VLAN 99 for the "native VLAN".
But what is the point when operating under switchport mode trunk?
Doesn't switchport mode trunk filter all tagged ...
- 167
0
votes
1
answer
217
views
I got locked out of my switch
I am currently practicing on cisco packet tracer, so I used the command " enable password 5 cisco"
then I leave the global configuration mode to the user mode and try to go to privilege mode ...
3
votes
1
answer
438
views
Cisco 9400-Supervisor Engine 1XL uplink help
I have inherited a Cisco 9400 with 6 line cards installed. I am trying to use some ports on one of the cards. I noticed that there is no link activity lights, no indication of any activity.
I think ...
- 85
4
votes
2
answers
613
views
Passive interface default - issue
I was trying to configure ospf router, I have a router connected to FW in G1/0/10 and mpls router connected g1/0/1, when i typed passive interface default in the ospf router i lost all connectivity ...
- 99
1
vote
0
answers
20
views
RSVP warning: ID "data" is not configured
I am trying to follow this document: https://www.cisco.com/c/en/us/td/docs/ios/qos/configuration/guide/12_2sr/qos_12_2sr_book/config_rsvp.pdf
to configure rsvp, using gns3, for Entering Senders or ...
3
votes
1
answer
333
views
Which command is used in Cisco ASA Firewall to display the whole packet flow?
Which command is used in Cisco ASA Firewall to display the whole packet flow on the firewall? This same command allows you to see if traffic is allowed, NATed, or going through a VPN tunnel?
1
vote
1
answer
78
views
How to configure IPV6 /53 subnet on packet tracer?
I have tried configuring a Ipv6 subnet address 2001:0dce:0000:0000::1/53 into the router interface.
It works but when the I tried setting the auto-configuration button on the PC connected to this ...
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0
votes
0
answers
82
views
Cisco 800 Series how Access VLan ISP?
i have a ISP that provide Internet by Vlan and static Ip :
ip XXXXXXXX
netmask 255.255.255.248 (/29)
gateway YYYYYYYY
with microtick i can get it work, but with a Cisco 800 Series dont.
how can i ...
0
votes
1
answer
44
views
ping shows different outputs
Both VLANS are working, and pings from R1 to R0 and vice versa also work successfully. But when I ping from the pink PCs to the blue PCs I get destination unreachable, and when I send pings from the ...
- 3
0
votes
1
answer
2k
views
What is Cisco ACI command equivalent to Cisco IOS `show version`?
Based on this link, Cisco ACI is actually based on the Cisco Nexus 9000 family.
The hardware for it is based on the Cisco Nexus 9000 family of
switches.
https://www.sdxcentral.com/data-center/...
- 391
2
votes
2
answers
3k
views
Why does the CISCO's command 'enable secret <password>' produce different hash from MD5?
I am configuring a CISCO's 4331 router password, in Packet Tracer. More specifically I use the command enable secret weakpassword. This command uses by default MD5 to hash the last string (i.e ...
- 131
2
votes
1
answer
57
views
Cisco router with 3 spaces between `deny` and `icmp`
I was configuring deny icmp any any traffic when I realized it was not in the config.
I verified it with do sh run | i deny icmp command as follows:
R1#configure terminal
Enter configuration commands,...
- 219
0
votes
1
answer
445
views
BGP Authentication Key-Chain Between Cisco IOS XE L3 Switch (c9300-24S) and Juniper MX480 Router
Need to create a BGP authentication keychain between Cisco and Juniper devices. Need assistance with config commands for Cisco 9300-24S.
0
votes
2
answers
5k
views
How to add multiple computers in cisco packet tracer?
Hey, I'm the newbie of Cisco Packet Tracer. In the image as you can see there are lots of computers(0-99,1-200). I couldn't do that. Is it possible or it just some way of describing how much computers ...
2
votes
1
answer
78
views
Cisco snmp-server single user for multiple snmp versions
Attempting to maintain SNMP v2c compatibility while implementing SNMP v3 on cisco switch 5506cx.
Would a user that was previously used for v2c see issues with v2c if it is added to a v3 group?
For ...
- 25
1
vote
1
answer
243
views
track command not found on switch Catalyst 2960-X Series
I have a problem with the command "track". I have done this command multiple times on other router and I believe my command is correct. However when I wanted to do this on a switch it shows "Invalid ...
- 37
1
vote
1
answer
245
views
Migrating Configuration - 3750G to 3750X
What is the best practices to migrate configuration from an older Cisco switch model to a newer Cisco switch model?
-I am not expecting to change any configuration, just simply want to be on the ...
- 681
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1
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78
views
why do I need the network name between two routers for RIP routing?
the network in my exercise
I am learning about networks and I just started to learn about dynamic routing(like RIP) but there is something I didn't managed to understand and is why do I need in the "...
- 3
0
votes
2
answers
8k
views
Why does yealink ip phone is not getting ip address from voice vlan?
I have configured separate vlan for voip and connected interface to it (as shown below). But the phone is not getting ip address automatically.
switch- cisco 2960-x
phone- yealink
I had tried: (on ...
- 1
4
votes
1
answer
429
views
How to connect QSFP+ transceiver with MPO connector and SFP+ transceiver with LC connector?
In data center application, 40G QSFP+ transceivers with MPO connector and 10G SFP+ transceivers with LC connectors are most common transceivers. But, with two different connectors, how can we make a ...
user48791
4
votes
2
answers
2k
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 ...
- 1,709
7
votes
5
answers
4k
views
Why does the Cisco show run command not show the full version, while the show version command does?
Is there any reason why Cisco show run does not show the full version which is 16.3.7 in this example?
IOSSW#show running-config | include ersion
version 16.3
while show version does?
IOSSW#show ...
- 391
2
votes
1
answer
98
views
Changing configuration on Cisco router
There is a Cisco router configured by another IT guy with specified addresses from ISP, now the problem is that the ISP give us new net mask and default gateway addresses, so what i did was changing ...
0
votes
2
answers
256
views
Duplex Mismatch Detection
I'm trying to create a lab on PT to learn about duplex mismatch. I made one end of Fast Ethernet half duplex and other end is full duplex. I was hoping to see an increment in late collisions which I ...
- 99
2
votes
2
answers
741
views
Cisco ip helper-address how exactly translation works?
Can anyone explain how exactly works translation from broadcast to unicast? What is changed or modified in IP packet? Already I have read how it works and configured it properly for my network but ...
- 21
0
votes
2
answers
186
views
Cisco Catalyst pseudo interface?
I think I remember reading somewhere that you could have multiple VLANs assigned to a single interface by way of a pseudo interface. Googling with that vocabulary doesn't return proper results though, ...
- 416
6
votes
2
answers
17k
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 ...
- 163
1
vote
0
answers
567
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 ...
- 1,412
-2
votes
1
answer
45
views
Textbook has different order of commands: login password password-value and also password password-value login Does the order matter?
Textbook has different order of commands: login password password-value
and also password password-value login
Does the order matter?
Cisco switch
- 129
6
votes
2
answers
41k
views
What does no shutdown command do? Cisco
Newbie here. I'm studying networking and struggling to understand the no shutdown command. I don't understand what no shutdown command actually does. I've read that it enables the interface but I don'...
- 515
6
votes
2
answers
7k
views
Cisco show log number of messages
When I run the "show log" command, it displays the latest 360 messages.
Why 360?
Can this value by changed?
If yes, what is the command for that?
Thanks.
- 399
4
votes
1
answer
96
views
set cli complete-on-space Cisco equivalent
Does anyone know what would be the equivalent, if any, of the Juniper command set cli complete-on-space for Cisco? I used to work with Juniper devices and I LOVED this feature, but now we are ...
- 681
2
votes
1
answer
1k
views
4507r Supervisor engines aren't operating redundantly
The tl;dr : I have two supervisor engines in a 4507r but the standby unit doesn't appear to be ready to perform when the active module dies.
On Sunday I had a network problem that appeared to be ISP ...
- 416
0
votes
1
answer
49
views
i cant configure the ip adress and subnetmask ,i only have one router "1941" and 2 pc's
the command line is this :
Router0(config-if)#ip adress 192.168.1.1 255.255.255.0
the error message is :
% Invalid input detected at '^' marker.
- 11
4
votes
2
answers
6k
views
I can't set a gateway of last resort
I can't seem to get to set a gateway of last resort on a router. I want it to forward anything whom's ip address is not in the routing table to router HQ through interface s0/0/0 by doing the ...
- 43
2
votes
1
answer
342
views
Cisco Embedded Packet Capture with NAT
I love the ability Cisco's Embedded Packet Capture (EPC) provides to remotely troubleshoot dataflows on IOS routers.
monitor capture buffer CAP_BUF
monitor capture point ip cef CAP_PT gig 0/0.1 both
...
- 666
5
votes
2
answers
1k
views
spanning tree RootGuard question on vPC switches
I have following diagram and two distribution switch connected back to back over vPC
Related spanning-tree question is it ok to use RootGuard on both distribution switch where access switch is ...
- 4,379
3
votes
1
answer
376
views
Set password of a Switch to "C?1sc0" using CLI in Cisco Packet Tracer
I have been asked to set the password of a Switch to "C?1sc0" in Cisco Packet Tracer.
The problem is that when i type "?" in CLI it prints out:
Router(config)#enable password ?
7 Specifies a ...
- 131
1
vote
2
answers
3k
views
How to assign all interfaces in one router to OSPF backbone area?
Is there any command to assign all interfaces in router (CISCO 2691) to OSPF backbone area? I was using this command for each interface.
network address wildcard-mask area area-id
Where wildcard ...
- 137
1
vote
0
answers
641
views
VLANs still exist on my switch as I reset it [closed]
I reset my Cisco 3750 by write erase and then del the vlan.dat file from the flash and reload it... but sh VTP status is still showing the VLAN...
why are the VLANs still there after I deleted the ...
- 81