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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...

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...

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...

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...

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...

Hi folks – The following was submitted in the Switches forum, but I’m hoping for a second opinion: I’ve been given a project to move vlans from our Core 6509s to the DL switches (3750s, etc. MLSs) in various closets, and have read two different ways of doing this. My question is which way is...

Hi folks – I’ve been given a project to move vlans from our Core 6509s to the DL switches (3750s, etc. MLSs) in various closets, and have read two different ways of doing this. My question is which way is generally preferred. The aspect I’m concerned with is the DL to Core connections. One...

Hello all – I have a mob of disenchanted users about to lynch me because of a problem that I cannot get to the bottom of. For the sake of simplification, let me summarize one aspect of the problem by saying that I recently migrated Microsoft Exchange Server 5.5 to 2K3, consolidating three...

Hello all – I have a mob of disenchanted users about to lynch me because of a problem that I cannot get to the bottom of. I recently migrated Exchange 5.5 to 2K3, consolidating three sites in the process. Now we have one Exchange Server at headquarters that hosts all mailboxes and public...

Hello All – Here’s a tough one: I have OWA working fine for some (internal) clients and not for others. The problem with some of the clients is that they cannot compose email. When attempting to create a new message or reply to an existing one, the control that does not load – identified in...

I’m new to some of the advanced features of MLS, and would like to ask what is undoubtedly a dumb question, but I can’t seem to get a grip on the concept. The question is, does STP have to be disabled in order to use GLBP? I want to add a second Distribution layer switch (3750)to our small...

Hello all – I’m wondering if anyone knows of a more secure OWA construction than just enhancing it with SSL. My current plan for our small company is to have one Exchange server on the inside lan to which I will allow OWA over the Internet using SSL. I’ve tested this and it works fine. But...

Hello – Can someone help me get through the hype? I am migrating Exchange 5.5 to 2003, have a Pix 515 (w/ dmz) and have reviewed many Microsoft scenarios, all of which recommend ISA over a FE Server-in-dmz / BE Server-in-lan scenario. The only reason I can see for using ISA in my case is to...

Hello all - I have a simple question, which surprisingly I can find no information for. In planning the migration from Exchange Server 5.5 to 2003, I'd like to consolidate our sites and centralize all servers at headquarters, as Microsoft recommends in cases like ours -- 3 locations throughout...

Hello all, I’ve currently got a series of GRE tunnels going between Cisco routers over Pix-terminated IPSEC VPNs. The GRE tunnels are there to enable EIGRP updates to pass, thereby allowing automatic failover of the VPNs to a secondary link. Those routers are inside the Pix firewalls...

Hello all, I’m sure you’ve heard this one before – but my searches aren’t coming up with anything. It’s a basic question that I’d like to be sure about before going further -- certainly would appreciate any help. I’m trying to design a failover scheme for a site-to-site vpn in the simplest...

Hello, I need to configure a remote-access (dyn addr) vpn using a wildcard PSK with IKE mode config, on a Cisco 1750 that currently has a site-to-site (static addr) vpn terminating on the same interface. If this were a Pix, I'd enter 'no-config-mode' for the working site-to-site vpn to keep it...

Hello, I set up a remote user vpn on a Pix last year, and now one of the users wants to trade in his Cisco VPN Client for a site-to-site vpn via his Cisco 806 router. The problem is that he has a dynamic address with his ISP, so I can't enter a specific "isakmp key *** address...