I want to show a basic BGP configuration for Internet access. In our case, we have two carriers (Sprint & Level3) and we act as an enterprise company, which needs reliable Internet access.
As a precondition we need an Autonomous System Number (ASN) and an IP address block assigned to us. We have to apply ARIN / RIPE / APNIC / LACNIC / AFRINIC for this purpose. We assume that we have 6767 as our AS number and 193.93.93.0/24 as our official IP block...
Overview
The first impression of Cisco 3845 router on me was that I felt it is too heavy.So, do not try to install it to rack alone. It has two internal power supplies (one by default). Don’t forget to order the redundant one, if you plan to run it for critical business.
The LAN connection is also redundant with two build-in Gigabit Ethernet interfaces. The good thing the GE 0/0 interface has SFP option. You can reach the far LAN Edge points on...
Recently, I had to swap the Internet router of my company. BGP and cef ate up the whole memory and it was not possible to upgrade the memory of Cisco 3725 router beyond 256MB. It was time to change it.
I had a chance to install a new Cisco 3845 with 1GB memory. Everything was fine except SSH access that I needed because of security policy. I searched the web and found “Configuring Secure Shell on Routers and Switches Running Cisco IOS” document on Cisco web site. It was a litt...
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