The dscp mutation map is a per-port configuration that permits to modify the dscp field of a packet. The mutation map works for EGRESS traffic only
We trust the documentation but it's event better to verify it.
The topology si simple:
PC1 11.0.0.1 --> G1/0/1 C3750-24 G1/0/24 --> G1/0/24 C3750-48 G1/0/1 --> …
Read MorePrivate VLAN configuration:
vlan 300 private-vlan primary private-vlan association 301-302 ! vlan 301 private-vlan isolated ! vlan 302 private-vlan communityPort configuration:
interface GigabitEthernet1/0/1 switchport private-vlan host-association 300 301 switchport mode private-vlan hostWhat about the SVI? …
Read MoreNetflow quick notes for basic config.
NETFLOW EXPORT
Send NetFlow data to a collector:
- From? (source)
- Where? (destination, port)
- How? (udp, sctp, backup)
- Version? (1,5,9)
SAMPLING / FILTERING
Not all traffic is evaluated to generate NetFlow statistics. Sampling (one packet each N) of filtering (sampling only on a …
Read MoreYour Route to Cisco Career Success by Kevin Wallace
A free ebook from Amazon/Kindle about the strategy to prepare for a brilliant career in networking.
UPDATE: the book was free just for a limited amount of time (I got the link from Twitter).
Read MoreThis week I'm attending an HP training in Milan.
The course topics aren't as challenging as I've expected but I had the opportunity to test focus on some interoperability problems that may occur in mixed environments, especially with Cisco and non-Cisco devices, like PVST.
For this post we use 2 switches, a Cisco and a …
Read MoreInspired by the Packet Pushers Podcast I setup my personal IPv6 tunnel to TunnelBroker.net. Registration is free and the configuration is straightforward.
The first step is the registration and setup of a tunnel to our IPv4 address. Second step the configuration of the tunnel on our side. The webiste includes many …
Read MoreYou can either do a planned, careful migration, or you can do it in a panic, and you should know full well that panicking is more expensive.
Martin Levy, director of IPv6 strategy for Hurricane Electric
Read More- Remember: voice Vlan is not automatically created when applied to a port. You must create it!
Read More Quite often when a network configuration includes authentication or 802.1x on network devices Radius is the protocol of choice.
InfoNtRadPing is a free utility to test a Radius server.
The usage is simple: insert the IP address of the radius server, the secret, user name and password of the user to …
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HP allows Cisco certified people to achieve it's MASE/ASE certs using Fast Track:
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A quick note about tcp small servers.
DOC-CD says:
The TCP small servers consist of three services:
Discard (port 9), Echo (port 7), and Chargen (port 19).
If we do a portscan to a router before and after enabling tcp-small-server with the command:
R(config)#service tcp-small-servers
We can see that these ports are …
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- Thou shalt above all, maintain the integrity of the network.
- Thou shalt have a long term strategic direction.
- Thou shalt always opt for quality before expediency.
- Thou shalt meet the requirements, exceed the expectations and anticipate the needs of users.
- Thou shalt benefit from a successful implementation by careful …
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