All Questions
502
questions
-1
votes
1
answer
27
views
VLSM Error on Cisco Distribution Switch [duplicate]
I have created 3 VLANS which should not overlap but somehow are giving me overlapping problems. Any reasons why? Is the switch buggy?
VLAN 10 10.1.1.0/28
255.255.255.240 Usable:10.1.1.0 to 10.1.1.15
...
1
vote
2
answers
126
views
Why are DNS packets processed by process-switched?
I have a question.
Equipment: Cisco 2821
CEF is enabled on all router ports:
sh ip interface | i CEF
Post encapsulation features: CEF Packet Capture
IP CEF switching is enabled
IP CEF ...
- 29
0
votes
0
answers
63
views
noob learning cisco
I'm trying to teach myself how to use cisco devices. i was given an router, switch and firewall. so far i been able to set up vlan and have intra vlan routing working. My issue is having the switch ...
0
votes
1
answer
46
views
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
0
votes
2
answers
41
views
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 ...
- 35
0
votes
1
answer
91
views
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/...
1
vote
1
answer
79
views
CISCO cellular Router cannot reach network via my PC
I configured the cellular and my router is connected to the internet ping (5/5) Success
but I still cannot access the internet via PC
Here is my running-conf
Current configuration : 2271 bytes
!
! ...
- 11
0
votes
1
answer
111
views
Why I’m getting overlaps with fast Ethernet 0/1 when assigning an ip
But I have been receiving error code when I want to assist an ip to s1/0
1
vote
1
answer
217
views
ISR 4331 vs ISR 4331/K9?
We have cisco router. On its box/package ISR 4331/K9 is written. I am watching a youtube video at below link, its title has word ISR 4331
https://www.youtube.com/watch?v=bk-4jkb6Cwo&list=...
- 111
2
votes
1
answer
691
views
OSPF routes are not advertised
routers with ASBR2 connecting to AREA 0 and 10 and ASBR1 connecting to area 0 and 20, there's no entry of routes in R1's routing table, help me out
R1#sh run
Building configuration...
Current ...
- 61
2
votes
1
answer
260
views
RIP routes are not being advertised
I have 2 routers(R3 and R4 connected with serial links). I have advertised my loopbacks with RIP ver 2. with 192.168.1.1/32 and 192.168.2.1/32 on R3 and 192.168.3.1/32 and 192.168.4.1/32 on R4.
My ...
- 61
1
vote
1
answer
173
views
What are the commands to configure static routes using next-hop IP addresses?
Given the network topology above and that X in all subnets should be replaced with 1.
What are the commands to configure static routes using the next-hop IP addresses on r1 and r2, given that you are ...
- 13
0
votes
0
answers
23
views
Which route does a cisco router prefer and why? [duplicate]
I have a small network i packet tracer whith some subnets. I connected the subnets with static routes. In one case I made two routes two the same subnets, but one is a serial connection. I wonder ...
- 1
0
votes
1
answer
854
views
Connect a router to multiple router/subnet - Cisco Packet Tracer
I'm studying DNS Server. So I try this.
Here is the flow when I request abc.com webpage from My PC.
My PC (192.0.1.2) send DNS query to Router0. Router0 then forwarding to DNS Nameserver (10.0.0.2).
...
- 103
0
votes
1
answer
1k
views
Cisco Packet Tracer gives "Invalid IP Address" when I assign an address to a router [duplicate]
I was given an exercise where I have an IP address range and I have to configure multiple sub networks from that range. The address is 238.61.192.128 with the mask 255.255.255.128 (/25). I created my ...
- 103