John, That interface stalling issue in GNS/Dynamips is due to a faulty virtual driver for the serial interfaces on the 3700-series routers. I researched this about a month ago because that interface stalling issue was really screwing up some of my Vol 3 labs, particularly when mcast is involved. I'd hit it before but it had always been a minor annoyance more than a major issue. In some of the Vol 3 labs, there is enough going on that I had interfaces stalling out constantly, routing protocol adjacenies that I couldn't keep stable, etc.
If you do a "show int sum" you'll see the output queue filling or full and increasing OQD numbers. The only way to temporarily clear it that I've found is a "clear int sX/Y." There are "solutions" on the net that include disabling CEF globally and/or disabling "ip multicast flow-cache" on the interfaces, but I don't consider that a valid solution for CCIE-level prep. After burning a couple hours trying to figure out if there was a way around it on the 3700 platform, I gave up and reworked my whole lab into 7200s for the main routers and 3640s for my BBs (as I had an OSPF bad LSA checksum issue when using 2691s for BBs). It wasn't what I wanted to spend a couple hours on 3 days before my lab but my lab has run nicely since. Biggest issue was that I couldn't put R4's serial interface in the 0/0 position on the 7200, so it had to move to s1/0 like it is on R2,5,6. That's why I had a line in my sed scripts to move that serial on the initial configs. Sent from my iPad On Aug 9, 2012, at 7:41 PM, John Olsen <[email protected]> wrote: > Hi All, > > OK, here are my four "Cat" configs. (eg configs for a 3725 pretending to be a > Cat.) Sorry, this will make for a long post, but I guess not all that big > since it is all text. These are initial configs, eg I have taken out > everything that was put in as a result of the lab tasks, but they are taken > from the actual running configs. I've had everything in lab 15 up to task 15 > running OK with this, so the Cat switches are able to take part in the BGP OK > and the connectivity all seems to be correct. This does depend on setting up > the Vlans in all the switches as per the earlier email. There is one glitch, > the routers with serial point to point links will randomly stop from time to > time. That is a problem I have seen before with 3725 routers on GNS3 and is > not related to the Cat switches. The only real solution I have found so far > is to use 7200's, which don't seem to exhibit that problem. If anyone knows > how to stop that happening I would be grateful. It has happened on an earlier machine running XP as well as the current one running Windows 7 64 bit. Main workaround is to save configs every time a change is made, and then the stuck router can be stopped and restarted from within GNS. > > regards > John > > CAT1 > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > version 12.4 > no service pad > service timestamps debug uptime > service timestamps log uptime > service password-encryption > ! > hostname Cat3550-1 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > no ip domain lookup > ! > ! > ! > ! > ! > interface Loopback0 > ip address 200.0.0.11 255.255.255.255 > ! > interface FastEthernet0/0 > no ip address > shutdown > duplex auto > speed auto > ! > interface FastEthernet0/1 > no ip address > shutdown > duplex auto > speed auto > ! > interface FastEthernet1/0 > description BB1 E0/0 > switchport access vlan 100 > duplex full > speed 100 > ! > interface FastEthernet1/1 > description R1 port Fa0/0 towards R2 > switchport access vlan 12 > duplex full > speed 100 > ! > interface FastEthernet1/2 > description R2 port Fa0/0 towards R1 > switchport access vlan 12 > duplex full > speed 100 > ! > interface FastEthernet1/3 > duplex full > speed 100 > ! > interface FastEthernet1/4 > description R4 Fa0/0 > switchport access vlan 40 > duplex full > speed 100 > ! > interface FastEthernet1/5 > description R5 Fa0/0 > switchport access vlan 567 > duplex full > speed 100 > ! > interface FastEthernet1/6 > duplex full > speed 100 > ! > interface FastEthernet1/7 > duplex full > speed 100 > ! > interface FastEthernet1/8 > duplex full > speed 100 > ! > interface FastEthernet1/9 > no switchport > ip address 150.101.14.1 255.255.255.0 > duplex full > speed 100 > ! > interface FastEthernet1/10 > switchport mode trunk > duplex full > speed 100 > ! > interface FastEthernet1/11 > no switchport > ip address 150.101.13.1 255.255.255.0 > duplex full > speed 100 > ! > interface FastEthernet1/12 > switchport mode trunk > duplex full > speed 100 > ! > interface FastEthernet1/13 > no switchport > ip address 150.101.12.1 255.255.255.0 > duplex full > speed 100 > ! > interface FastEthernet1/14 > switchport mode trunk > duplex full > speed 100 > ! > interface FastEthernet1/15 > switchport mode trunk > duplex full > speed 100 > ! > interface Vlan1 > no ip address > shutdown > ! > interface Vlan220 > ip address 150.100.81.11 255.255.255.0 > ! > ! > ! > ! > ip http server > ip http secure-server > ! > ! > ! > ! > control-plane > ! > > ! > line con 0 > exec-timeout 0 0 > logging synchronous > line aux 0 > line vty 0 4 > no login > line vty 5 15 > no login > ! > ! > end > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Cat 2 > ! > version 12.4 > no service pad > service timestamps debug uptime > service timestamps log uptime > service password-encryption > ! > hostname Cat3560-2 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > no ip domain lookup > ! > > ! > ! > interface Loopback0 > ip address 200.0.0.12 255.255.255.255 > ! > ! > interface FastEthernet0/0 > no ip address > shutdown > duplex auto > speed auto > ! > interface FastEthernet0/1 > no ip address > shutdown > duplex auto > speed auto > ! > interface FastEthernet1/0 > ! > interface FastEthernet1/1 > description R1 port Fa0/1 towards BB1 > switchport access vlan 100 > ! > interface FastEthernet1/2 > ! > interface FastEthernet1/3 > description BB2 E0/0 > switchport access vlan 200 > ! > interface FastEthernet1/4 > description BB3 E0/0 > switchport access vlan 300 > ! > interface FastEthernet1/5 > description R9 Fa0/0 > switchport access vlan 300 > ! > interface FastEthernet1/6 > description R6 Fa0/0 > switchport access vlan 567 > ! > interface FastEthernet1/7 > description R7 E0/0 > switchport access vlan 567 > ! > interface FastEthernet1/8 > description R8 Fa0/0 > switchport access vlan 200 > ! > interface FastEthernet1/9 > ! > interface FastEthernet1/10 > switchport mode trunk > ! > interface FastEthernet1/11 > switchport mode trunk > ! > interface FastEthernet1/12 > switchport mode trunk > ! > interface FastEthernet1/13 > no switchport > ip address 150.101.12.2 255.255.255.0 > ! > interface FastEthernet1/14 > switchport mode trunk > ! > interface FastEthernet1/15 > switchport mode trunk > ! > interface Vlan1 > no ip address > shutdown > ! > ! > ! > ip http server > ip http secure-server > ! > ! > ! > ! > ! > control-plane > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > line con 0 > exec-timeout 0 0 > logging synchronous > line aux 0 > line vty 0 4 > no login > line vty 5 15 > no login > ! > ! > end > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Cat3 > ! > ! > version 12.4 > no service pad > service timestamps debug uptime > service timestamps log uptime > service password-encryption > ! > hostname Cat3560-3 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > no ip domain lookup > ! > ! > ! > ! > interface Loopback0 > ip address 200.0.0.13 255.255.255.255 > ! > interface FastEthernet0/0 > no ip address > shutdown > duplex auto > speed auto > ! > interface FastEthernet0/1 > no ip address > shutdown > duplex auto > speed auto > ! > interface FastEthernet1/0 > ! > interface FastEthernet1/1 > ! > interface FastEthernet1/2 > ! > interface FastEthernet1/3 > ! > interface FastEthernet1/4 > description R4 Fa0/1 > switchport access vlan 240 > ! > interface FastEthernet1/5 > description R5 Fa0/1 > switchport access vlan 256 > ! > interface FastEthernet1/6 > ! > interface FastEthernet1/7 > ! > interface FastEthernet1/8 > ! > interface FastEthernet1/9 > switchport mode trunk > ! > interface FastEthernet1/10 > switchport mode trunk > ! > interface FastEthernet1/11 > no switchport > ip address 150.101.13.3 255.255.255.0 > ! > interface FastEthernet1/12 > switchport mode trunk > ! > interface FastEthernet1/13 > switchport mode trunk > ! > interface FastEthernet1/14 > switchport mode trunk > ! > interface FastEthernet1/15 > switchport mode trunk > ! > interface Vlan1 > no ip address > ! > > ! > ip http server > ip http secure-server > ! > ! > ! > ! > ! > control-plane > ! > > ! > ! > line con 0 > exec-timeout 0 0 > logging synchronous > line aux 0 > line vty 0 4 > no login > line vty 5 15 > no login > ! > ! > end > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Cat4 > ! > > ! > version 12.4 > no service pad > service timestamps debug uptime > service timestamps log uptime > service password-encryption > ! > hostname Cat3560-4 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > no ip domain lookup > ! > ! > ! > interface Loopback0 > ip address 200.0.0.14 255.255.255.255 > ! > interface FastEthernet0/0 > no ip address > shutdown > duplex auto > speed auto > ! > interface FastEthernet0/1 > no ip address > shutdown > duplex auto > speed auto > ! > interface FastEthernet1/0 > ! > interface FastEthernet1/1 > ! > interface FastEthernet1/2 > ! > interface FastEthernet1/3 > ! > interface FastEthernet1/4 > ! > interface FastEthernet1/5 > description R9 Fa0/1 > switchport access vlan 230 > ! > interface FastEthernet1/6 > description R6 Fa0/1 > switchport access vlan 256 > ! > interface FastEthernet1/7 > description R7 Fa0/1 > switchport access vlan 256 > ! > interface FastEthernet1/8 > description R8 Fa0/1 > switchport access vlan 220 > ! > interface FastEthernet1/9 > no switchport > ip address 150.101.14.4 255.255.255.0 > ! > interface FastEthernet1/10 > switchport mode trunk > ! > interface FastEthernet1/11 > switchport mode trunk > ! > interface FastEthernet1/12 > switchport mode trunk > ! > interface FastEthernet1/13 > switchport mode trunk > ! > interface FastEthernet1/14 > switchport mode trunk > ! > interface FastEthernet1/15 > switchport mode trunk > ! > interface Vlan1 > no ip address > ! > ! > ! > ip http server > ip http secure-server > ! > ! > ! > ! > ! > control-plane > ! > > ! > ! > line con 0 > exec-timeout 0 0 > logging synchronous > line aux 0 > line vty 0 4 > no login > line vty 5 15 > no login > ! > ! > end > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
