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Broadcast Storms
try www.networkuptime.com tip of the moment Broadcast storms also http://www.cisco.com/warp/public/473/22.html#before Multicast in a Campus Network: CGMP and IGMP Multicast flooding problem: Background Information -
layer 2 redundancies
http://routergod.com/paulhogan/let's talk about the Hot Standby Router Protocol. HSPR is a way for two Cisco routers to share a common virtual IP address while one router is actively routing packets, the other router or routers are standing by in case the active router fails. It's a very good... -
block internet access
All access lists start out with the term access-list followed by the group number of the access list. IP extended access lists are numbered from 100 to 199. The next term in an access list is permit or deny. The next term is the protocol the access list statement deals with. Next is the... -
Help arp problems
IGRP was created by Cisco, it only runs on Cisco routers. There is no RFC as it was never submitted to the general public for comment. How do you configure IGRP on a Cisco router?First from Global Config mode you enter the command router igrp followed by an autonomous system number, one will... -
ISDN vs. T1
Why do we like BRI ISDN so much? Because it's basically a phone call, except it's digital instead analog. ISDN BRI is way cool, it has 2 channels called B channels, they actually carry the data. And there is this other channel, it's the D channel, it carries signaling for call setup and...- clahnum
- Post #15
- Forum: Nortel: CS1000 (Meridian) systems
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(Newbie question) spanning vlan: should be avoided?
Lan Switching Cisco's philosophy about switches is "do no harm". All ports are by default in the same vlan, vlan1 to be exact. So you can plug in the switch and plug in the cables and now every port is in a separate collision domain. Switches work at layer 2 of the OSI model. They... -
Broadcast Storms
The switch always needs a router connected to it if it's going to route packets between vlans! A serious problem with switches. Switches by default forward broadcasts. If your switch topology contains redundant paths or bridge loops, a broadcast storm of Biblical proportions could result. ·... -
root password recovery -- HOW?
Cisco Psychic TAC Hotline: Password Recovery Or, how to banish Satan from Cisco... Steps to password recovery: 1. Power cycle the router. 2. Banish Satan by sending a BREAK within 60 seconds. 3. From ROM mode, change config register to 2142. 4. Reboot router. 5. Get into Priv Exec (enable)...
