Other Network Architecture Subjects

Span tree network traffic

I recently upgraded my network switches to 3 2950 switches. These 3 switches are configured with cross over cables (port 23 on switch #1 connected to Port 23 on switch #2, Port 24 on switch #2 connected to Port 24 on switch #3)When I ran a 2 minute ...

3750 1496 and 8996 MTU performance

I've got a 3750 that I'm using for performance testing. I'm seeing that the throughput with 8996 size MTU frames is in the 900Mbps ranges. The throughtput with 1496 size MTU frames is in the low 700Mbps range. With a 4006 I don't get this low perform...

Egress Filter - spoof packets denied

I applied Egress filters on my external routers to only allow out my valid NAT IPs. looking at the logs I see single packets with spoof addresses blocked every 15 to 20 minutesHow can I find where these are coming from. I assume a sniffer which i do...

Trunking Cisco with Nortel

I am looking for help trunking a couple of GBIC ports on a 2970 with a Nortel Passport core switch. My ports are all up, my PortChannel is up, but I cannot get any data through the trunk. Any help would be appreciated. Thanks.

Over 65% of LAN traffic has packet size of < 64 bytes

Just connected a sniffer to our network and noted that over 65% of the packets were < 64 bytes.All our desktop pc's are 100 mbs, Server nics and Switches are 100 and 1000 mbs. With ethernet packets running over 1500 bytes today, my concern or questio...

Cisco 837 and Static IPs

Hello,I'm new to Cisco routers, and till now I have been using other third-party routers which all had the option to disable NAT, so I was able to use the 32 static IPs my ISP has provided to me for my ADSL connection.Now I thought I would try a Cisc...

831 Router with PPPoE - No Dialer String error

Hi,I've been trying to use a config template that appeared in this forum to configure PPPoE client onan 831 to connect to an ADSL ISP. When I try to connect to the ISP the 'debug dialer' output is:*Mar 2 03:07:29.629: Di1 DDR: Cannot place call, no ...

Visitor VLAN ACL Troubles

need help on complex NAT problem

Dear NAT experts, I am facing a small NAT related problem. Basically I need to have 1 inside interface and 2 outside interfaces. The inside interface sits on a private IP subnet. While both outside interfaces sit on two different public IP ranges. In...

AS5300 "Password Expiry Feature" not working

HiWe are using AS5300 for Dialup. AS5300 is configured to use Raidus using Windows Database (ACS v 3.2). I am trying to configure AS5300 so that when user dialin first time it will ask them to change there password. ( I had enable "User must change ...

Out Of Band Modem configuration problems.

Hi I am having a problem with Out Of Band on a Cisco 837 router using the Async and Virtual Aux running IOS 12.3(4)T2. I have experimented with several configs however after extensive testing our work around is to remove AAA Authentication and reload...

Problem with downloadable ACL's with ISDN

Hi,I have interesting problem.Problem is related to Cisco 3725 with E1 and digital modems used as access server.Access server is using Cisco Secure ACS for AAA purposes.I defined downloadable access list as RADIUS cisco av-pair.It works fine with mod...

OID

Can somebody help me to find the OID for Virtual trunks on IGX.I am already having a MRTG for Normal E1 Trunks but the OID which i am using for E1 trunk is not working for the Virtual trunks configured.I tried doing that but getting error "Invalid OI...