Hi all. For the past 30 days my users cannot browse to a short list of sites.
The only oddity is that they use a dialer to route the traffic through.
Attached is the config.
The issue started 30 days ago with bellcanada.net.
We have tried using the bellcanada.net DNS with no change in behavior.
please configure under dialer1:
ip tcp adjust-mss 1452.
Hope this helps, please rate post if it does!
My bad, per cisco doc the command goes under the "ip nat inside" interface:
Please let us know if it solves your issue.
The IOS that you have supports the mss-adjust.
The symptoms are typical of the problem, please enable it on the ethernet inside and if doesn't work, at least it's ruled out.
mtl01rt01ec(config-if)#ip tcp ?
compression-connections Maximum number of compressed connections
header-compression Enable TCP header compression
This is what I get. No option for mss.
So you were able to configure for dialer and not for ethernet ?
Also can you try "ip adjust-mss 1452" ?
These are the options that I have.
Yeah, the dialer has been in place for two years.
Interface IP configuration subcommands:
access-group Specify access control for packets
accounting Enable IP accounting on this interface
address Set the IP address of an interface
authentication authentication subcommands
bandwidth-percent Set EIGRP bandwidth limit
bgp BGP interface commands
broadcast-address Set the broadcast address of an interface
cef Cisco Express Fowarding interface commands
cgmp Enable/disable CGMP
directed-broadcast Enable forwarding of directed broadcasts
dvmrp DVMRP interface commands
hello-interval Configures IP-EIGRP hello interval
helper-address Specify a destination address for UDP broadcasts
hold-time Configures IP-EIGRP hold time
igmp IGMP interface commands
irdp ICMP Router Discovery Protocol
load-sharing Style of load sharing
mask-reply Enable sending ICMP Mask Reply messages
mrm Configure IP Multicast Routing Monitor tester
mroute-cache Enable switching cache for incoming multicast packets
mtu Set IP Maximum Transmission Unit
multicast IP multicast interface commands
nat NAT interface commands
nhrp NHRP interface subcommands
ospf OSPF interface commands
pgm PGM Reliable Transport Protocol
pim PIM interface commands
policy Enable policy routing
probe Enable HP Probe support
proxy-arp Enable proxy ARP
rarp-server Enable RARP server for static arp entries
redirects Enable sending ICMP Redirect messages
rgmp Enable/disable RGMP
rip Router Information Protocol
route-cache Enable fast-switching cache for outgoing packets
rsvp RSVP interface commands
rtp RTP parameters
sap Session Advertisement Protocol interface commands
sdr Session Directory Protocol interface commands
security DDN IP Security Option
split-horizon Perform split horizon
summary-address Perform address summarization
tcp TCP header compression parameters
unnumbered Enable IP processing without an explicit address
unreachables Enable sending ICMP Unreachable messages
urd Configure URL Rendezvousing
verify Enable per packet validation
vrf VPN Routing/Forwarding parameters on the interface
wccp WCCP interface commands
Sorry, it should be "ip tcp adjust-mss" under eth interface. If you don't have the option, need to upgrade IOS.
Ok, were you able to put the above suggested mss-adjust commands in the lan interface ?