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Posted on in Networking
This is a picture (larger) of a Cisco 7604 with Sup32 and SAMI card. The modules you see here are:
| Part Number | Description |
|---|---|
| CISCO7604 | Cisco 7604 Router |
| SUP32-GE-3B | Cisco Catalyst 6500 Series / Cisco 7600 Series Supervisor Engine 32 with 8 ports Gigabit Ethernet, PFC3B, and MSFC2A |
| WS-SVC-SAMI-BB-K9 | Cisco … |
Posted on in Networking
For some reason, they don't make this completely obvious.
login: admin
password: admin
Posted on in Networking
I would hope there is a better way to do this. The other day, I had a need to see all the interfaces on a router and how much input and output traffic they were passing. This just seems like something that should be built in, but I've not seen …
Posted on in Networking
This seems to be a pretty common problem for Cisco users. Not that Cisco devices have more queue drop problems, just that more Cisco users are a little confused by the information generated in the show interface command.
Specifically, we're talking about the lines that look something like this:
Input …Posted on in Networking
If you find yourself in the situation where a Cisco 7200 series router has a corrupted IOS image or the flash drive has gone on the blink, the following documents may be useful to you. Not all of these documents are Cisco 7200 specific, but they are all useful.
Posted on in Networking
If you've worked on networks long enough, you're probably familiar with
iperf. This application is great for testing
throughput between two computers on your network. Unfortunately, if you find
yourself in a situation where you have less than two computers to test with,
iperf is less than ideal.
Fortunately, Cisco …
Posted on in Networking
In the following example, I'm going to set up a Simple Network Management Protocol version 3 (SNMPv3) user on a Cisco router with limited view of the system MIB.
Create an SNMP view that limits the user to the system MIB.
ROUTER(config)# snmp-server view SYSTEM system included
Create an …
Posted on in Networking
In this case, gentlemen, size matters.
Yesterday, I calculated the average packet size for one of the networks I work on using data from 263986M (263,986,000,000+) packets.
Average packet size for that sample was 557 bytes.
Posted on in Networking
Although routers and switches are often located near each other in a network environment, the two devices offer very different functionality. Routers are network devices that send data packets to distinct network segments. A router examines incoming packets and makes routing decisions based on the destination address in the packet …
Posted on in Networking
In the 1970s, Bob Metcalfe and David Boggs invented Ethernet while working at Xerox PARC. At that time, Ethernet's top speed was 3 Megabits per second (Mbps). This version was installed in a few sites including Boeing, the White House, and various academic institutions. In the early 1980s, the original …
Posted on in Networking
The first layer of the OSI Reference Model is the physical layer. This layer describes the physical characters of the network. This layer defines the tangible aspects of the network medium, such as types of cables and pin arrangements, but it also defines how much voltage is used in copper …
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The fifth layer of the OSI Reference Model is the session layer. Since applications running on different hosts may need to establish a connection in order to operate, the session layer is responsible for setting up the connection. It is important to note that the session layer is responsible for …
Posted on in Networking
The Open Systems Interconnection (OSI) Reference Model first came into being in 1978. The OSI group was intent on getting a model into the field quickly, so they elected to adopt a seven-layer model created by Charles Bachman of Honeywell. By this time, the lower four levels of the model …
Posted on in Networking
No matter how small, all network installations go through an initial planning phase before implementation. The new network administrator must take many factors into consideration when planning a network. Most importantly, the administrator must understand the required capacity, compatibility, and flexibility of the new network. Gathering this information requires a …
Posted on in Networking
Cisco ASA limits the number of concurrent remote-access VPN sessions a user can maintain. The default is three. When a user hits the limit, a new connection can fail or an existing idle session can be removed, depending on the configured limit and session state.
The CLI knob is still …
