Cisco is a major provider of networking equipment. Cisco devices often run IOS or NX-OS. This is a generic tag to be used when no more specific tags are available. See the partial list of tags in the full Tag Wiki.
0
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0answers
9 views
Use Wireshark to sniff network traffic and save target file to disk
Is it possible to configure Wireshark to sniff traffic for the target file and automatically save this file to the hard drive? The file can not be downloaded directly from server to local computer, ...
5
votes
1answer
95 views
Cisco callmanager SIP features
I am a programmer working in a software for the sales dept. I would like to know if a feature I want to implement is possible or not.
The user has an application where he can see information about a ...
3
votes
1answer
78 views
Configuring a Cisco ASA 5505 for routing
I'll start by pointig out that networking issues have always left me scratching my head. There is something about routing especially that I just haven't had that "Oh I get it" moment yet, so it's ...
0
votes
0answers
25 views
Individual AAA configurations or access-classes? [on hold]
I'm looking into ways to control authentication for ssh sessions to our cisco networking equipment. The goal is to be able to track individual admins logging in rather than a blanket local user.
...
3
votes
2answers
210 views
Securing Cisco device from brute force attacks
I'm trying to block users from configuring a Cisco IOS device if they have entered incorrect passwords a number of times. This is the command I'm using:
Router(config)# login block-for 120 attempts 3 ...
2
votes
1answer
68 views
cisco 7200 vlan
I have cisco 7200 with 4 interfaces. Gi0/1 is my WAN where the ISP is sending me untagged and tagged traffic. Gi0/3 is my LAN interface.
Now I have vlan ID 2402. This vlan come from Gi0/1 and I want ...
4
votes
0answers
45 views
Strange drop-outs in Cisco 7200 LNS lab
I'm testing several functions on emulated Cisco 7200 routers, in GNS3, prior to actual purchase.
One of the functions I've been testing out is LNS functionality. I've been primarily following this ...
1
vote
1answer
75 views
Cisco IOS: Service Config
For Cisco routers/switches, I use the no service conifg in production.
What's the impact for the production system if I use the service config command when I have the configuration already loaded in ...
1
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0answers
33 views
VPN cisco ASA tcp connection issue -pcap inside
I have set up a VPN between my company and a customer. Packet captures show that the customer receives a packet and then sends an ACK back as it hits our internet firewall, this is as far as the ...
-2
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0answers
88 views
How to Allow VLAN from one gateway to another? [on hold]
I have gateway1 in which i have configured some VLANs (xxx) that will be available to the switches under it. And i have a gateway2 in which i will have some other VLANs(yyy). There is a Firewall in ...
7
votes
1answer
127 views
How to provide failover for space-diversity T1
I have inherited a small, insular, dedicated network which is essentially trouble-free, so naturally I want to improve it :-) I lowered my network knowledge and savvy to somewhere around a 2 to 3 ...
8
votes
3answers
221 views
Cisco Router config alternatives to Cisco SDM (i.e. no Java required)
We have an old Cisco 850 Series router hanging around here and happen to have a need for it temporarily until we get our new Palo-Alto into place.
Now, after I reset it and try to pull up the ...
0
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0answers
29 views
Different ping-results depending on “www” [closed]
I did a ping on Cisco's website and noticed that you get different results depending on whether you put a "www" there or not. Why is that?
4
votes
1answer
114 views
Mechanisn for performing bandwidth accounting on Cisco routers
We're about to purchase a pair of Cisco 7201s for our edge routers, and some Juniper EX4200s for core. And I'm looking for implement bandwidth accounting for our hosted servers on this hardware (most ...
1
vote
0answers
49 views
Cisco 3560X Switch MAC reported with same IP as other equipment
We have a network with a bunch of 3560 switches setup and desktops/laptops and some Rockwell Automation equipment connected to them. We had to add a new switch, a 3560X to the network recently to add ...
5
votes
0answers
111 views
Cisco IPSec Site-to-site VPN. Permit traffic if VPN is down
Bit of 'belt and braces' configuration planning.
Background:
We have a successful site-to-site VPN link to our remote datacenter.
The remote 'protected' network is also the IP network range that is ...
3
votes
0answers
64 views
Cisco IOS and Junos BGP inter-op issue; RFC1918 addressed were advertised via eBGP
I experienced an issue with an eBGP peering recently that I can not explain so I guess it is related to a Junos and Cisco IOS interoperability issue. Is this a know bug or a configuration blunder on ...
5
votes
0answers
106 views
Two Devices, Same Subnet, No Communication [migrated]
This is a stripped down version of my home network, and my problem is I can not get 192.168.20.100 to communicate with 192.168.20.4.
The workstation pings both routers and the server fine, and ...
3
votes
1answer
85 views
Cisco NTP server does not respond to queries
I have an NTP configured through out our in a hierarchy. 100% reliable with regards to providing time for Cisco devices. At one of our sites we allow cameras, servers, and workstations to utilize our ...
0
votes
1answer
78 views
VLSM and CIDR IPv4 subnetting in your head [on hold]
I'm not sure if this is anything (sane) people do, but how can I easily calculate these things of an IPv4 network without using a paper (and preferably without calculator)? A straight-forward method ...
2
votes
1answer
69 views
IOS for Cisco 6509/7609
Good morning,
I need to move one SUP7203bXL from a 6509 chassis to a 7609. Now the SUP has the IOS:
s72033-adventerprisek9_wan-mz.122-33.SXJ.bin
I would like to have the IOS: ...
1
vote
2answers
109 views
How to achieve Redundancy/Failover for two WAN links (not ISPs) ?
We have two wan data links (with two different telecom providers) going from our central office to a remote location. Each data link currently transfers data from different equipment that are in two ...
1
vote
2answers
97 views
Help with bringing DR site in to general network
I hope I can get some help as I've been wracking my brain to figure out the best way to get a new MPLS connection set up between our main site and our DR site. I'll first give a description of what I ...
3
votes
1answer
59 views
Switching to multiple context mode on a Cisco ASA 5585-X; what happens to running config?
I might need to implement a change where an existing in production ASA 5585-X pair (single fail-over) would need to transition to multiple context mode to allow the addition of a new context.
For ...
0
votes
4answers
129 views
Creating a LAN - which addresses to use? [closed]
I'm doing the CCNA, but there are some things that are not properly explained about real-world-stuff that you really need to know, so here it is:
If I were to create a new LAN (that should connect ...
8
votes
3answers
810 views
Confusing A, B, C network classes
I'm studying IPv4 addresses and came across this whole thing about classful addressing. I get the idea behind it, bit there is something I find confusing:
There are two "ABC" ranges:
First one:
A: ...
1
vote
1answer
65 views
How are edits applied to a `running-conf` when using Cisco CP's “Configuration Editor”?
The Cisco Configuration Professional 2.5 User Guide PDF doesn't say much about the Configuration Editor tool except, "For information about how to use Cisco CP to work with the Configuration Editor ...
2
votes
1answer
81 views
Setup Cisco AP 1602 to broadcast 2.4 & 5Ghz on the same SSID
From the documentation on the AP it looks like it can broadcast 2 BSSIDs with the same SSID. One on 2.4 Ghz and one on 5 GHz. Devices see one SSID and those that can connect on 5 are connected on 5 ...
2
votes
1answer
178 views
OSPF/BGP/Route-Map issue
hello to all my friends...
i configured this scenario but R1 only traces until 10.10.13.3 (R3) !
plz help me...
All routers have a loopback 0 interface X.X.X.X/32 where X is the number of the ...
2
votes
1answer
70 views
EIGRP MD5 authentication
I would like to know more about EIGRP MD5 authentication in the following situation:
an attacker captured the MD5 hashed key and send to the target router to fake the authentication, is it possible?
...
1
vote
1answer
89 views
Cisco RV042 Port Forwarding
We have an application server that our company's branches connect to. Right now, they can connect because the E.R.P app developer configured our main router for port forwarding. They connect by typing ...
0
votes
1answer
51 views
Determine description of switch interface that is not labeled
I am trying to find out the description of a particular interface in a 2950 Cisco switch, the interface has no description and I am trying to find out what device is connected to it.
I've ran a couple ...
1
vote
0answers
90 views
Cisco Prime Infrastructure 2.0 not pulling any SNMP data
Good evening,
I have setup Cisco Prime Infrastructure 2.0 and, though I have added manually my 4 network cores as devices without any problem, I can't get a single trap or a single SNMP information ...
2
votes
2answers
88 views
Can't Upload New ASA Image (I/O Error)
I'm trying to upgrade the code on a fresh, out of the box Cisco ASA 5510. However, whenever I transfer the code via TFTP I get the following message -
Writing file disk0:asa847-k8.bin...
%Error ...
2
votes
1answer
82 views
Configure Cisco 5508 WLC with Internal DHCP and external DHCP
I have configured a Cisco WLC 5508 to use the internal DHCP server and a windows NPS server. So far, all is working fine.
However, I want to use EAP authentication with an external DHCP server. How ...
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votes
0answers
91 views
BGP Multihoming with 2900's - one /24 and 2 ASA 5510's
I know this has been discussed multiple times but still wanted to renew this discussion- I for one can definitely use some valuable suggestions and clarifications.
Scenario :-
I have the following ...
5
votes
2answers
114 views
OSPF on ASA 8.2 not advertising /32
We have set up OSPF between our 2 ASA 5540 running in Active/Passive and our Internet provider's Juniper routers. We would like to advertise routes based on the content of an ACL through a route-map : ...
2
votes
2answers
124 views
Show connected (up) interfaces on cisco devices
Is there any way to show a total count of interfaces that are in status "up" on a cisco router?
The purpose is to let a script go through all routers and show a summarization count of "up" ...
4
votes
1answer
88 views
Is it possible to shape and queue on a switched port in a cisco 4506-E?
Background
I have a cisco 4506-E with a sup 7L-E running IOS-XE 03.04.03.SG. The switch is connected to a 150 Mbps circuit via 1 Gbps ethernet port. The port is configured as a switched access ...
6
votes
1answer
87 views
Does Cisco *ip dhcp snooping limit rate* apply if DHCP snooping is not configured for the access VLAN?
Came across a situation where DHCP snooping was enabled on a Cisco switch, but only for certain VLANs. However, all access ports had a ip dhcp snooping limit rate 15 applied whether or not DHCP ...
3
votes
1answer
82 views
Local in show ip bgp output
What does Local mean in this output?
R4#show ip bgp 10.6.0.0/24
BGP routing table entry for 10.6.0.0/24, version 19
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to ...
3
votes
2answers
187 views
How do Metropolitan Area Networks (MAN) interconnect?
If an organization in a city (perhaps New York) has multiple offices within that city, how would they interconnect their LANs? I already understand that they will connect to an ISP, but my question ...
4
votes
1answer
104 views
Catalyst4500 Sup7E “mgmtVrf” vs “Mgmt-vrf”
Background
I recently upgraded a pair of Catalyst4500s from Sup6E to Sup7E. Before the upgrade, I pre-loaded IOS-XE 3.4.1SG on the Sup7Es, and loaded the migration configurations into bootflash: on ...
1
vote
2answers
104 views
Where does the NAT router connect to?
In a typical enterprise network, the NAT router has inside and outside interfaces, the inside interface is connected to the LAN and the outside interface is connected to the ISP. Is the NAT router ...
7
votes
3answers
241 views
packet drop on 10gb/s interface
I have a certain number of packets dropped on my 10gb/s interface, on Cisco 6500 with Sup 720. You can see underneath the number of dropped packet within a minute, after I cleared the counters.
We ...
3
votes
1answer
86 views
Using a Cisco router as an L2TP client?
I have a customer that for various reasons has a Cisco router sitting behind a NATed ADSL connection. They want to create a VPN to one of our points of presence and the only options we offer are site ...
4
votes
2answers
183 views
MPLS can reroute, but can it route?
I have 4 Cisco routers, connected one to another like the following:
**R1**(s1/0)--(s1/0)**R2**(s1/1)--(s1/0)**R3**(s1/1)--(s1/0)**R4**
All of them have an IP address assigned on their interfaces. ...
2
votes
1answer
60 views
PIM mode for low latency video
What is the best PIM mode for a campus video network? There are several relevant factors:
All video is local to the campus.
Click to view needs to be fast as possible (Life safety issues)
Sources ...
0
votes
1answer
71 views
Multicast and HSRP
Does an HSRP VIP factor into the PIM designated router and IGMP querier election on a segment? Should they be located on the same interface or device? What would be the effects of having them ...
1
vote
1answer
163 views
Cisco IOS privilege level explained
I have access with level 1 privilege on a Cisco switch. But, I want to see all configurations and interfaces, while being able to modify nothing. I searched the internet for the proper level of ...
