Questions tagged [cisco-ios]
For discussion about Cisco's Internetwork Operating System - Cisco IOS
0
votes
0answers
22 views
Database of obsolete/unsupported features/commands? [on hold]
I am currently deploying 20+ C9200L switches for my company. The purpose is to replace the existing infrastructure which consists of a hodge-podge of different switches purchased at separate times and ...
1
vote
2answers
67 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 ...
0
votes
2answers
50 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, ...
2
votes
2answers
52 views
Client timeout for Cisco IOS Static DHCP Pool
I'm not a network admin, but I have an old Cisco Catalyst 3560 for my network. I've successfully set up a DHCP Pool:
ip dhcp pool 192.168.0.0
network 192.168.0.0 255.255.255.0
default-router 192....
0
votes
3answers
67 views
Switch syntax, vlanXX and vlan [space] XX
How does a switch OS know that this is the same syntax? There are certain commands where you might reference the vlan like so "switchport access vlan 35", (a space between vlan and the number) and ...
1
vote
1answer
29 views
Fair-queueing every class within CBWFQ
My question is similar to:
What is benefit of using CBWFQ with fair-queue statement
Given this policy-map (without class-maps) configuration:
policy-map test
class DSCP30
bandwidth percent 20
...
2
votes
1answer
31 views
Cisco QoS SRR Share & Shape impact
I am working on understanding the impact of using shaping and sharing with the SRR scheduler. Given these 2 commands on an interface:
switch(config-if)#srr-queue bandwidth share 40 20 30 20
switch(...
0
votes
1answer
43 views
cisco switch iOS running into problem
I updated Cisco 2960x iOS, but when it started to operate I encountered this error.
"Mar 25 12:02:19.878: %ILET-1-AUTHENTICATION_FAIL: This Switch may not have been manufactured by Cisco or with ...
0
votes
1answer
32 views
Cisco create BGP connection, do we need two direction's neighbor command?
I have two routers like bellow:
in the Router1, I configured like bellow:
!
router bgp 100
bgp log-neighbor-changes
no synchronization
neighbor 12.0.0.2 remote-as 200
network 1.0.0.0 mask 255....
2
votes
1answer
44 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 ...
6
votes
1answer
268 views
Bandwidth limit Cisco 3400 ME problem
I want to limit bandwidth (speed) of interface of Cisco 3400 ME switch.
I did these:
policy-map parent
class class-default
shape average 64000
And in gi0/2 interface I apply it: service-policy ...
2
votes
0answers
36 views
How to adjust output queue length on Cisco IOS synchronous PPP (Dialer/Virtual-access) interfaces [duplicate]
I have a Cisco 3845 running IOS 15.3(3)XB12 which is accepting synchronous MLPPP calls from ISDN lines via a PRI. I want to reduce the size of the output queue on the router's PPP interfaces, but the ...
2
votes
1answer
186 views
How to save the initial startup configuration in IOS XR?
I'm willing to try all the Segment Routing implementations one-by-one in XRv 9000 Router. Each time I have a specific implementation for SR e.g., SR-TE, SR-MPLS, SR-OSPF, and SR-ISIS ... etc.
The ...
1
vote
1answer
33 views
Cisco 887VA not handing out IPs to new requests
A few days ago seemingly with no changes (other than we changed the adsl mode on the controller). DHCP has stopped working for 2 of the 3 vlans we have configured on a Cisco 887VA.
From the Cisco ...
0
votes
0answers
31 views
How to enable RESTCONF server in IOS-XR?
I aim to enable RESTCONF server on Cisco IOS-XRv 9000.
I did not find online anything about enabling HTTP server in this IOS-XR version. However, with NETCONF server can be enabled.
For IOS-XE is ...
0
votes
1answer
26 views
Assigning static IP addresses to dialin PPP users on Cisco IOS
I have a Cisco router running IOS 15.3 serving as a dial-in PPP endpoint for a handful of modems. I am using local authentication and a local IP pool to hand out dynamic IP addresses to the callers; ...
0
votes
0answers
45 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 ...
3
votes
1answer
42 views
ip dhcp class command
Here is a DHCP configuration that we have here:
ip dhcp class range
ip dhcp pool abc
network 10.10.10.0 255.255.255.0
default-router ...
class range
address range 10.10.10.10 10.10.10.254
My ...
0
votes
1answer
48 views
Path for accessing Cisco-IOS-XE-Tunnel yang module in postman
Recently I am working with RESTCONF on Postman.
Today I was trying to send HTTP request via postman to IOS-XE-Tunnel using the below path:
https://XXX:XXX/restconf/data/Cisco-IOS-XE-tunnel:tunnel
...
-2
votes
1answer
34 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
3
votes
0answers
181 views
What is the effect of using “ntp allow mode control 0”?
I am attempting to mitigate the issues surrounding bug report CSCum44673. According to the software release notes found here, I need to ensure that all of my routers are on IOS version 15.2(2) or ...
1
vote
0answers
62 views
Cisco ISR Zone Based Firewall dual stack not matching returning traffic for ipv6
I have a bit of a problem with my Cisco 1921 ISR config. I have ipv4 (obviously) and also native ipv6 connectivity in my home lab. I am trying to set up the zone based firewall. With ipv4 traffic, the ...
1
vote
1answer
44 views
Protect Cisco C3560CX switch from unauthorized access on remote location
I have to extend our corporate lan to remote location on which we can not control the physical access to the switch.
What are the best practices in this case/scenario? So, I will shut down password ...
2
votes
1answer
43 views
cisco catalyst creating user fails
I took over a couple of Cisco 2960x switches. They are configured with a telnet login. Now that telnet isn't that great (and my colleagues are afraid of CLI but might have to configure things too) I ...
3
votes
1answer
62 views
Cisco Router IOS update
I am facing problem in update the IOS of Cisco 7304 router. I am upgrading from 12.4(24)T2, to 15.2(4)S7 this. but I was boot from this version 15.2(4)S7 it booted proper from flash. But when I put ...
0
votes
1answer
51 views
License question on router cisco
Could anyone help me on license question on router cisco.
Is ADV IP SERVICES LIC the license on router Cisco that all I need if I want to run these features on my router Cisco : L3VPN, L2VPN, VPLS and ...
2
votes
1answer
45 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 ...
3
votes
1answer
275 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 ...
1
vote
1answer
52 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
...
3
votes
1answer
148 views
PAT not translating at all
I am studying for my CCENT.
I threw together a PAT practice lab.
Other than DHCP and RIP everything is pretty stock.
No VLANs
No security
Just NAT overload on ACCESS router.
I am stumped why it isn'...
5
votes
2answers
189 views
Carrying remote VLAN via 2 routers to the local gateway
I have a serverA (192.168.15.1) from site A and VLAN is 15, however the VLAN 15 gateway is set at site B (192.168.15.254).
There are two ISP routers as a metro role to connect each other by subnet ...
1
vote
2answers
281 views
How can I ping with source option in Cisco Router?
How can I ping with source option in Cisco Router?
I have a ISR 4321 Router, I want to ping from a source IP address:
Router#ping ?
WORD Ping destination address or hostname
ip IP echo
...
1
vote
1answer
139 views
Help with small office setup - Cisco SG350 28 port switch
I have very limited knowledge in Cisco IOS but in a crucial state to setup up a small office network. I have bought 2 Cisco SG350 28 port Layer 3 switch,
Switches should be enabled with VLAN and VTP.
...
3
votes
1answer
122 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 ...
0
votes
1answer
83 views
DSCP re-marking on Cisco Switch
I've followed the commands in this post:
DSCP trust boundary
policy-map MARKDOWN
class class-default
set dscp ef
Interface Config:
interface gig 0/1
service-policy input MARKDOWN
The ...
1
vote
1answer
71 views
How to run SIP phones in the LAN (NAT Overloaded to single IP)?
We have a small office network switch connected to a DSL modem for internet and telephony access. Now we would to extend network to another location in the same building for which I deployed a cisco ...
4
votes
2answers
89 views
After I set the “router rip” networks, how can I check it?
In my CGR1240 I have set network 192.168.1.0 to my router rip, but how can I check it?
If I add more networks in rip, how can I list all the networks I have added?
I can not show the router rip in ...
6
votes
2answers
142 views
Why the Cisco Router's loopback interface can not be showed up by default?
By default, why the Cisco Router's loopback interface can not be showed up?
Router#show ip interface brief
Interface IP-Address OK? Method Status Protocol
...
2
votes
2answers
44 views
Is the static route discover automatically or need run any command in Cisco Router?
Is the static route discover automatically or need run any command?
I have two router, and I have configured the IP address for the link port of them.
but the Router3's route is empty:
Router#show ...
5
votes
2answers
86 views
Cisco Router GigabitEthernet interface can not add ip address?
Cisco Router GigabitEthernet interface can not add ip address?
Router(config)#interface gigabitEthernet 2/1
Router(config-if)#ip add ?
% Unrecognized command
Router(config-if)#ip add 12.12.12.1 255....
1
vote
1answer
688 views
How to configure DHCP pools for 2 VLANs/subnets sharing a switch
I've set up DHCP pools on a layer 3 switch that goes out to 13 layer 2 switches. Most of which have their own subnet and VLANs, and everything works fine when that's the case. But when there are two ...
0
votes
2answers
43 views
Is it possible to enable DHCP on multiple hosts via Cisco switches or routers? [closed]
I think I know the answer to this, but thought I ought to ask around.
When setting up new networks with multiple hosts, like a university computer lab VLAN with 30+ workstations, for instance, is it ...
2
votes
3answers
543 views
Virtual Appliance - Cisco Router
My colleague said that it is possible to virtualize a Cisco router i.e. run the Cisco IOS inside ESXi and it would act like a real cisco router so thus can be used in a light production environment.
...
4
votes
1answer
66 views
CISCO IOS's feature Secure Shell Version 2 Enhancements for RSA Keys
I have a switch C3750V2-48PS with IOS ver. 12.2(55)SE5. I wanted to copy to it public key for the ssh client but I do not have following command available
Switch#configure terminal
Switch(config)#ip ...
0
votes
1answer
41 views
Cisco IOS 12.3 - Mysterious NAT - Where is it defined?
I have the following config (IOS 12.3):
A.B.C.13 stands for the outside, public IP, bound on interface Fa0/1.52
37.247.X.206 is a public client I am using to test
x.x.x.n stands for a random public ...
1
vote
1answer
72 views
Access list per port for 48-port switches
We have 3750g, 3750e, 4948, 2960 series Cisco switches and all of them are 48 ports so we want to create one standard access list per port switch and in every ACL we permit 5-6 prefix (short prefixes ...
1
vote
2answers
57 views
Cannot put an IP address on layer two interface
I am trying to assign an IP address to Interface g0/0 on a Cisco 892FSP. However, it keeps telling me that a layer two interface cannot be assigned an IP address. Any ideas?
3
votes
1answer
50 views
what is the point of making directories in a cisco cli
what is the point of making directories in a Cisco router.
I noticed its was kinda like Linux mkdir and all that stuff, but what is the purpose?
2
votes
1answer
213 views
Assign DHCP IP address on Cisco router interface
Hi, dhcp router is configured with following DHCP settings:
ip dhcp pool B
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
ip dhcp pool C
network 192.168.2.0 255.255.255.0
default-...
1
vote
1answer
801 views
how to deny ping from one direction but not the other using Access-list
Hello everyone.
What I'm trying to do is to deny ping access from the 12.12.12.0 network to reach the 10.10.10.0 network but not deny ping access to go from 10.10.10.0 network and reach the 12.12.12....
