Notes, Arts, Motivation, and Distractions
The Happiest Song I’ve Ever Heard This Song Will Always Put a Smile on my Face
Family Time – Will Probably Never Have a Beautiful Moment Like This Again
Other Stress Relieving Songs
Dance to Relieve Stress
Getting Back into Aerial Silks… OUCH
BGP Globally Unique (public) AS# Range 1-64511
BGP Private AS# Range 64512 – 65535
router bgp (as can’t be previously used)
router bgp 650002
bgp router-id 1.1.1.1
neighbor 10.1.2.2 remote-as 65002
then configure on the other
next router
router bgp 65002
bgp router-id 2.2.2.2
neighbor 10.1.2.1 remote-as 65001
neighbor 10.2.3.2 remote-as 65002
verify
sh ip bgp sum
ipv6 router ospf 1
router-id 1.1.1.1
exit
int f0/0
ipv6 ospf 1 area 0
int f1/0
ipv6 ospf 1 area 0
do the same thing pretty much on the other routers change router-id
sh ipv6 ospf inter bri
Path Preference
1 Intra-Area (O) – routes learned from the same area
2 Inter-area (O IA) – routes learned from a different area
3 External Type 1 (E1) – routes learned from outside OSPF marked as E1
4 External Type 2 (E2) – routes learend outside of OSPF marked as E2
5 NSSA Type 1 (N1) – routes learned from a NSSA area marked as N1
6 NSSA Type 2 (N2) – routes learned from a NSSA area marked as N2
sh ip route ospf
router ospf 1
area 1 stub (makes area 1 a sub area)
area 1 stub no-summary (totally stubby)
area 1 nssa (not so stubby area)
area 1 nssa no-summary (totally not so stubby area)
LSA
1 router lsa router link advertisements within an area
2 network lsa dr link advertsiements within an area
3 summary lsa abr network advertisements between areas
4 summary abr network advertisements between areas
5 external lsa asbr edternal route advertsiements
6 multacast lsa multicast advertsiements
7 nssa external lsa nssa asbr external route advertsiemetns
8 external attribute lsa for bgp bgp advertsiements
9-11 opaque lsa for future use
point to point
dynamic 10
no dr bdr
multipoint
manual 30
no dr bdr
broadcast
dynamic 10
dr bdr
nonbroadcast
manual 30
dr bdr
router types
internal routers conencted to the same area
backbone routers routers connected to area 0
area border router abr routers connected to multiple areas
autonomous systems border router asbr routers conencted to segmetns external to ospf
int f0/0
ip ospf message-digest-key or authentication-key
ip ospf message-digest-key 1 md5 cisco
ip ospf authentication message-digest
int f1/0
ip ospf message-digest-key 1 md5 cisco
ip ospf authentication message-digest
router ospf 1
area 0 authentication message-digest
router id 1.1.1.1
router ospf 1
(process id is 1)
passive-interface default
no passive-interfcace f0/0
no passive-interfcace f1/0
network 10.0.0.0 0.255.255.255 area 0
sh ip ospf int brief
make template copy paste with different router ids
sh ip ospf nei
Bandwidth and Delay
Metric Value – bandwidth, load, delay, reliability, mtu
default is bandwidth and delay
config t
ip route 0.0.0.0 0.0.0.0 1.1.1.1 name default-route
show run | i 0.0.0
router eigrp
red static
sh ip eigrp topo
(all paths even if not showed in routing table)
Feasible successor is a path whos reported distance is less than the feasible distance and it is considered a backup route. Eigrp will keep up to six feasible successors in the topology table. Only the one with the best metric the successor is placed in the routing table.
Equal cost load balancing and unequal cost load balancing
EIGRP provides a mechanism to laod balance over unequal cost paths through varience command. Varience is a number 1 to 128 multiplied by the local bes tmetric then includes the routes with the lessor or equal metric. The default varience value is 1 which means equal-cost load balancing
EIGRP Stub
router eigrp1
no passive-interface f1/1
router eigrp 1
no auto-summary
passive-itnerface default
no passive-interface f0/1
eigrp stub
sh ip eigrp nei
suppressing queries
without license advance routing, it could cause issues
EIGRP for IPV6
ipv6 unicast-routing
ipv6 router eigrp 1
(define router id)
eigrp router-id 1.1.1.1
do that on the other devices too
show ipv6 eigrp inter
make template, copy paste