Routing

I am a newbie to Cisco.  I have a router that pings another at a remote location.  We only use pings on this particular router to monitor a link, so when the pings drop we know a link is going down.  It used to do a continuous ping of the distant end...

We have a ASR 9K router which has below inteface. Interface is up but IP to its intrafce is not pingable.This is something weird behaviour as IP should ping intrface is up. Below are the details. Please give ur suggestion i believe its a intrafce iss...

Hi expert, I need your advise on a new deployment.I currently work in a small ISP, and we currently have over 20,000 customers.What we want is to seperate our core from border gateway, i.e. we want to use BGP on the border ASR and ospf on the core an...

I work for a service provider and I have a customer that is complaining of drops and CRC errors on his T1, but only when he's pushing traffic across it.  The T1 has been stress tested repeatedly and is clean.  When the customer tries to FTP a file fr...

Hi guys, I would need your advice on a point not clear for me I make a quick search on this forum, however I didn't find an answer (but I am almost sure this issue was discussed already...) My concern is what could match an acces-list configured on ...

Hello,I am having a bit of an issue with my Site-to-site VPN.  I am connecting an 871W at a remote location back to our Corporate office ASA 5520.  To this point, I have created a network device in the ASA for the remote network and a network group f...

Quick questions folks, we have a Cisco 2811 running for the past 8-9 years non-stop.We now have purchased one Cisco 4321 and we are looking to replace the 2811 with this new 4321 router.What is your advise on this? Being that these 4000 series are so...

Hi All,Here is the scenario (topo attached):1. One CE BGP router peering with two carriers running different MPLS/VPN network2. Private BGP network with both carriers3. Each carrier connects to one remote site (no IP address overlapping)4. One BGP in...

Hello , i have some question regarding fair-queue...I am not clear whether fair-queue is same as CBWFQ..... What is fair queue ? Can we configure fair queue on newer release...15 and later ? How to configure per-flow queue-limit and number of dynamic...

Hello,When configuring the bandwidth command, e.g as below policy-map TESTClass Data_Criticalbandwidth percent 40This "percent 40". Is this 40% of the Interface BW that the Policy Map is applied to, or is it related to a certain queue size? What exac...

Core issueOur customer is having two C7609 running with 12.2(18)SXF3. all of the module (WS-SVC-FWM-1) got rebooted with following error:Jan 15 09:03:14: %OIR-SP-3-PWRCYCLE: Card in module 3, is being power-cycled off (Module not responding to Keep A...

Hello,  Im looking for a way to mitigate TTL Expiry attack on a Cisco 4948-10G.  I've been googling around for hours, however, havent yet found a way to do it :(  Does anyone know a workaround to match low TTL packets?  Currently routing low TTL pack...

Hi folksI have a case where one router (R1) is connected to basic land based Internet using static IP. The other router (R2) is connected to Internet using several 3G/4G operators using both static and dynamic IPs.I've researched and done some testin...