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Thanks again.

My previous response was to ChrisAC -- thank you, unclerico. This is more of what I was thinking of. Speaking of BGP, I do have a follow-up question. If I register for an AS with ARIN, must I also register for my own public IP subnet? I would think so, but also wonder whether an ISP can...

Since we our ISP (only one currently) manages our external DNS, that means that I'd have to alert him, have him propagate the new info worldwide - maybe doing the same with the second ISP. There has to be a better way of doing this without going to BGP. I've heard vaguely about scripts that...

Hello, I have a basic question regarding Internet link failover and DNS. Assuming I can successfully reroute traffic to an alternate ISP following a service outage with my primary ISP, how do external DNS databases get updated following the change? I have internal web servers that are mapped...

Thank you. If you can load Cisco Network Assistant, this is what I'm using. It's grabbing everything on the remote devices. Just looking at SYSLOG on several switches, all logging is disabled except buffer: no logging exception no logging console no logging monitor no logging trap logging...

“Ip cef” does not show in the config -- IOS version 12.2(31). Yet CEF is running. And it definitely appears to be running on the interfaces configured with ‘no ip route-cache cef’. “Show adj detail” has entries. At this point, I’m concluding that CEF is not allowed to be disabled on this...

I'll check tomorrow. But isn't it on by default, and therefore only showing up in the config when it is off?

Thanks, guys. Burtsbees, an Informational syslog message appeared when I made an incidental config change on the agent switch. I have to say, syslog is the more baffling of the problems. I had to put this aside today, but will forward the config tomorrow. I believe it is just a 'logging...

Perplexed by something . I’m trying to clean up some 2950 L2 switch configs. On all switches, a predecessor configured snmp and syslog logging, but the configs reference a non-existent server IP address. That’s fine – I can just change the address to the correct netmon server. But what is...

Hello all - On a 4506 L3 switch, a predecessor configured 'no ip route-cache cef' on the vlan SVIs. I would like to re-enable cef, but now am not sure if it is actually disabled on these interfaces. 'Sh int switching' seems to confirm the configuration by showing all packets process-switched...

Thanks very much guys. Yes, OSPF does not auto-summarize. I like your solution, uncle -- and the replies from you both, confirming what I suspected. Bigger (i.e. higher-tech) isn't always better. There's definitely a place for EIGRP and RIP in smaller networks.

Thank you for your response. Yes, the terms 'distribution' and 'core' are relative. In smaller networks, using EIGRP, I have created a core/distribution/access topology, where there was certainly a use for chopping up a class B into smaller subnets, and then summarizing them up to the 'core.'...

Hello all, I have an OSPF question. How do you summarize intra-area routes? I know all about ABRs between areas(using ‘area range’) and ASBRs between ASs (using ‘summary-address’). But just within one area 0, how do I summarize addresses upwards from the distribution to the Core? With...

Hello all, We have an IPS 4200 appliance connected via trunk to a core root switch, for which we’d like to create a pseudo-failover construction, whereby two switch access ports, each in assigned to different vlan, are connected to each other. Understanding PVST, and going through the...

...actually, I did take this a bit further by getting output from "show interfaces [type number] switching" and then "show ip traffic". The results showed that there were no cache misses, indicating that the excessive processing was for traffic destined for the router, and that the dropped...

Hello all – I’m trying to figure out what is causing the input queues on my 6509 core router vlans to fill up to the point where excessive input drops are occurring. Related to this is the question of why most of the traffic on those vlans is process-switched, instead of fast- or cef-switched...

Its not a major issue, I know. But I’m going to have dozens of these SVIs on the 6509s as I move the ‘real’ vlans off to a DL. My first choice was to use a ‘switched core’ design, where I’d have only a couple of new vlans on the Cores, load balancing w/ the DL. But that design was rejected...

Oh, one more thing... also, can the 3750 still be configured as a L3 port, or does it need to be a L2 port also?

Ugh.. was afraid of that. One more question, if I can impose again... Assuming the supervisor can be upgraded to all-IOS, any opinions on the ease - or lack thereof -- of upgrading? Thanks much for your help.

Basic question for many, I’m sure… I’m new to the 6509 and am trying to set up a simple P2P L3 link between the 6509 (Sup1A, MSFC2 -- core) and a 3750 (DL). The 6509 supervisor has CatOS -- MSFC has IOS. I’m used to the simple IOS: int fa0/10 no switchport ip address 1.1.1.1. .... But how...