Category: Cisco
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Secondary IP On Cisco ASA
While decommissioning some old routers, I need to transfer an IP address to an ASA on a subnet. Unfortunately the ASA’s don’t allow you to do this. The standard “ip address X.X.X.X Y.Y.Y.Y secondary” doesn’t work. I did a quick google and this beautiful bastard had the solution, static ARP with proxy-arp. Figure out what…
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BFD – Bidirectional Forwarding Detection
BFD is a routing protocol independent fast failure detection method(subsecond detection is possible). It is basically a faster way to signal to your dynamic routing protocols({Cisco – OSPF, IS-IS, EIGRP, and BGP}{Mikrotik – OSPF and BGP}) that there has been a failure of a neighbor. The Cisco link above has a very good description of…
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Odd Cisco Inspect Behavior
I was recently asked to evaluate why a network was having issues with watching youtube or download large files. I checked speed and duplex, every thing was fine on my and their sides. show int I checked the CPU and everything was fine. show proc cpu history To rule out the rest of their network,…
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What Could Be More Simple Than Replacing A 6509 Supervisor…?
Noting…unless of course you are me 🙂 Here’s the situation. We are doing user aggregation on a 6509 chassis. Due to cost considerations, we only put a single Sup in. We had a power supply failure which subsiquently killed the super…don’t ask me how, but it did. I quickly threw in a redundant sup720 I…
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Communications Manager Express Voice Translation Rules
The Cisco link is here. The idea is that you can transform dialed or dialing numbers on phones or gateways using these methods. First, create a translation rule: voice translation-rule number rule precedence /match-pattern/ /replace-pattern/ Example: voice translation-rule 10 rule 1 /1235551111/ /1235552222/ Then create a translation profile: voice translation-profile name translate {called | calling…
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Cisco Recertified!
I’m back to the land of the living! I’ve been studying hard for the last month and a half and really bearing down the last week and a half. Needless to say the last two days have been insane…my brain is broken right now. If you want to ask me any Cisco networking questions, do…
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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…