Category: Networking
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Using PCQ With PPPoE – Mikrotik
I came up with a method about 2 years ago to use PCQs with PPPoE instead of the traditional simple queue(SQ) method. As you guys know SQs are more resource intensive and as they grow they can delay packet delivery. Using PCQs can help the resources on heavily utilized routers. Quick video of configuring everything:…
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Rate Limit A Cisco 3560, 3570, 3560E Port
I sometimes use 3560Es as edge routers. This means that I no switchport the interfaces and put IPs on them to connect to customers. Here on the edge is where I rate-limit a user’s connection speed. On a 3550 this is pretty straight forward, but on a 3560, or a variation of it, this is…
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Cisco – Absence Of A Wildcard Mask In An ACL
If I have a standard ACL entry like this: access-list 98 deny 10.0.0.0 access-list 98 permit any and I apply it to an interface. What addressing does this block? One might think that leaving off the wildcard mask would use the classful boundary(/8 or 0.255.255.255) of the addressing…but one would be wrong. In IOS if…
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Configure Cisco 2509 For Frame-Relay
While doing my CCIE studying I configured an old 2509 I had to act as a frame relay switch. This is more or less just a quick dump of my config for posterity 😉 IOS version c2500-i-l.121-27b.bin frame-relay switching ! interface Serial0 description *DCE serial connection to 1 no ip address encapsulation frame-relay clockrate 56000…
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Mikrotik VRRP On VMWare
I keep a VMWare server at the house to mock up configs on. I love being able to ramp up and down to test as many routers at once as I like. While working on an VRRP implementation recently I hit a small problem…it wouldn’t work! I made a little video outlining the problem and…
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VM Failover With SAN Replication Across Multiple Datacenters
This video and the included configs/diagrams show how to have failover with VM infrastructure/SAN replication in multiple datacenters. This basically leverages the power of BGP to move our public addressing. BGP is the ONLY choice to have addressing seamlessly migrate from one site to another…it is the protocol that the Internet happens to run on…
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Mikrotik ROS 5.9
What’s new in 5.9 (2011-Nov-29 14:32): *) ssh – fix mempry leak when client uses public key authentication; *) ppp – added support for new RADIUS attribute MT-Delegated-IPv6-Pool (#22); *) ntp client – faster initial synchronization; *) ppp – added support for dhcpv6 pd; *) wireless – nv2 improvements for 11n cards; *) hotspot –…