I have a tunnel betwen a Cisco 3640 and linux gentoo, the internet acces for the Cisco is from a Riverstone Backbone, so i want migrate that Riverstone backbone to a cisco Backbone (CAT 4507) but the tunnel is presenting problems, i dont have web acces, email, etc, i read and found that the problems is MTU, i tried to change the MTU in the tunnel but present the next error.
IPGW4-VPN(config-if)#mtu 1436 % Interface Tunnel9 does not support adjustable maximum datagram size
so i fix the ip mtu and ip tcp adjust-mss and got the same problem
interface Tunnel9 bandwidth 2048 ip address x.x.x.x ip mtu 1436 ip tcp adjust-mss 1436 tunnel source x.x.x.x tunnel destination x.x.x.x tunnel mode ipip
when i do a sh interface got
Tunnel9 is up, line protocol is up Hardware is Tunnel Description: x.x.x Internet address is x.x.x.x MTU 1514 bytes, BW 2048 Kbit, DLY 500000 usec, reliability 255/255, txload 1/255, rxload 1/255
i dont know what else do, i tried to fix the MTU in the tunnel and in the inteface Fasth but got the same problem, please your help how i can fix this, any help is welcome.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...