Tshoot preparation: Routers configurations (R1)

Download the tshoot topology from cisco, CCO login is required. These are the configurations of R1 in the diagram. interface Serial0/1/0 no ip address encapsulation frame-relay end interface Serial0/1/0.12 point-to-point bandwidth 128 ip address 10.1.1.1 255.255.255.252 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco frame-relay interface-dlci 102 end router ospf 1 router-id 1.1.1.1 … Continue reading Tshoot preparation: Routers configurations (R1) →

Tshoot preparation: Frame relay configuration

Download Tshoot topology from Cisco, CCO login is required. Look at the Layer2/3 Topology you will see 4 routers are connected to a WAN cloud, for this WAN I chose frame-relay. The router I am using is 3825 router with NM-AS4. 4x DB60 to DB60 DCE-DTE cables are needed. frame-relay switching interface Serial1/0 bandwidth 128 … Continue reading Tshoot preparation: Frame relay configuration →

Tshoot BGP: Path unchanged despite local preference has been modified.

All routers within their own AS has been configured with IGP, routers within their own AS are reachable to one another (imagine the above diagram is part of an AS network). The border routers are connected to each other AS and exchanging prefixes. As shown in the diagram, two paths have different bandwidth, suboptimal routing … Continue reading Tshoot BGP: Path unchanged despite local preference has been modified. →

Cisco 3825 NM slots: Router crashed and reboot relentlessly

I just realized that Cisco 3825 actually has only 2 NM slots, it appeared to have 3 NM slots but only slot 1 and slot 2 have an internal connector, the third unnumbered slot only has a bracket within. My Cisco 3825 crashed, perhaps my NMs did not installed properly....I am not sure. Slot 1 … Continue reading Cisco 3825 NM slots: Router crashed and reboot relentlessly →

Tshoot: Standby supervisory engine continuously auto-reboot.

SupV 10 GE IOS version: 12.2(31)SGA8 IPBase-M. Problem: Standby Sup engine reboot continuously. No service impact as active sup is taking care of the chassis. Resolution: Reload active sup engine. redundancy forced-switchover command in privilege exec mode will not work because standby sup kept rebooting hence no chance for active sup to detect there's a … Continue reading Tshoot: Standby supervisory engine continuously auto-reboot. →