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[FW-1] AW: [FW-1] vrrp & ospf
- To: [email protected]
- Subject: [FW-1] AW: [FW-1] vrrp & ospf
- From: "Markus Hilty (GNS AG)" <[email protected]>
- Date: Sat, 4 Oct 2003 14:47:34 +0200
- Reply-to: Mailing list for discussion of Firewall-1 <[email protected]>
- Sender: Mailing list for discussion of Firewall-1 <[email protected]>
- Thread-index: AcOJvZciooOQnQrLR2q7LTcfvquBWgAt/ekA
- Thread-topic: [FW-1] vrrp & ospf
Nokia Support
Resolution 16304: Can a dynamic routing protocol like RIP or OSPF be used with VRRP Monitor Circuits?
Subject: Can a dynamic routing protocol like RIP or OSPF be used with VRRP Monitor Circuits?
Product Line: IPSO (Operating System)
Category: VRRP
Version:
Date Modified: 05/03/2003
Description: Can a dynamic routing protocol like RIP or OSPF be use with VRRP Monitor Circuit?
VRRP Version 2 is defined in RFC 2338. You can fetch it from ftp://ftp.isi.edu/in-notes/rfc2338.txt.
Solution: This is a excerpt from this RFC:
The Virtual Router Redundancy Protocol (VRRP) is designed to eliminate the single point of failure inherent in the static default routed environment. VRRP specifies an election protocol that dynamically assigns responsibility for a virtual router to one of the VRRP routers on a LAN. The VRRP router controlling the IP address(es) associated with a virtual router is called the Master, and forwards packets sent to these IP addresses. The election process provides dynamic fail-over in the forwarding responsibility should the Master become unavailable. Any of the virtual router's IP addresses on a LAN can then be used as the
default first hop router by end-hosts. The advantage gained from using VRRP is a higher availability default path without requiring configuration of dynamic routing or router discovery protocols on every end-host."
There are a number of methods that an end-host can use to determine its first hop router towards a particular IP destination. These include running (or snooping) a dynamic routing protocol such as Routing Information Protocol [RIP] or OSPF version 2 [OSPF], running an ICMP router discovery client [DISC] or using a statically configured default route.
Since VRRP MC is designed to be a virtual static default route for end-hosts, this does not work well in conjunction with dynamic routing protocols since VRRP is not injected into dynamic routing protocol tables.
As it stands now, IPSO does not inject VRRP IP addresses into dynamic routing protocols. This functionality may be available in a future release.
Attachments:
-----Ursprüngliche Nachricht-----
Von: Keraudy Jean [mailto:[email protected]]
Gesendet: Freitag, 3. Oktober 2003 16:09
An: [email protected]
Betreff: [FW-1] vrrp & ospf
Hello,
It seems that isn't possible to annouce a virtual IP address from VRRP with
OSPF. Any experience or work around ?
thanks for your help,
Regards,
Jean Keraudy
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