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7.4

Implementing HSRP

Asked by kam_uk in Miscellaneous Networking, Network Design & Methodology

Tags: isdn, link, vlan3

Hi

ISP --- 2503 --- PIX 506E --- 3550 L3 Switch --- bunch of 2950's --- users/servers/guests

At the moment, we have a Cisco 2503 router that provides internet connection to our office. This in turn is connected to our Cisco PIX 506E firewall. The 2503 contains a BRI interface to kick in an ISDN connection should our leased line go down.

I'm thinking this is not enough. The ISDN link will be slow compared to the 2Meg line we are using, and this may create problems for the users.

So, I'm thinking along the lines of implementing HSRP. The only possible issue is that we are implementing a VLAN solution. There will be 3 VLAN's; VLAN1 for the clients which has a default gateway of 192.168.1.1 (the VLAN1 address of our 3550 switch), VLAN2 is an isolated VLAN whose DG is the 192.168.2.1 interface of the PIX, and VLAN3 is the server VLAN whose DG is 192.168.3.1 on the 3550 (VLAN3 address on the 3550). The 3550 has a default route pointing to the 192.168.1.254 interface on the PIX, and there is intervlan routing between VLAN1 and VLAN3 on the PIX. VLAN2 is isolated.

The above was configured as we wanted 3 VLANs, but the PIX 506e can only handle two logical interfaces, therefore VLAN3 uses VLAN1 for internet access. I hope it makes sense.

Anyway, back to HSRP. The only device that uses the 2503 router as a default gateway is the PIX. Despite the slightly complicated solution described above, this shouldn't affect a possible implementation of HSRP should it?
[+][-]12/06/06 04:48 PM, ID: 18089789Accepted Solution

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Zones: Miscellaneous Networking, Network Design & Methodology
Tags: isdn, link, vlan3
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Solution Provided By: gelgin
Participating Experts: 2
Solution Grade: B
 
[+][-]12/07/06 03:23 AM, ID: 18092164Author Comment

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[+][-]12/07/06 11:59 AM, ID: 18096432Assisted Solution

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