Term
| How to enable Authentication with multiple keys? |
|
Definition
#int fa0/0
#ip ospf authentication message-digest
#ip ospf authentication-key [0,7] key
#ip ospf message-digest-key [1-255] md5 key
#router ospf 1
#area 0 authentication [message-digest] |
|
|
Term
| Changes the default cost for that particular area |
|
Definition
#router ospf 1
#area 1 stub
#area 1 default-cost [0-16777215] |
|
|
Term
| Converts the area to NSSA, Stub, TS or TSNSSA |
|
Definition
#router ospf 1
#area 1 [stub, nssa] [no-summary] |
|
|
Term
| If applied in an ABR, sends an E2 default route to the ASBR for the NSSA route; if applied to the ASBR, the default route must be configured |
|
Definition
#router ospf 1
#area 1 nssa default-information-originate |
|
|
Term
| Used when the router is ABR and ASBR at the same time. Supresses the ABR from generating LSA 7. |
|
Definition
#router ospf 1
#area 1 nssa no-redistribution |
|
|
Term
| Used on the ABR to let the LSA type 5 that is entering the Area 0 available to get to other ABRs. Puts the forwarding address in 0.0.0.0 |
|
Definition
#router ospf 1
#area 0 nssa translate type7 suppress-fa |
|
|
Term
| Changes the OSPF cost reference. Used when there's interfaces over 100Mb/s, the command allows OSPF to differenciate 100Mb to Gb interfaces |
|
Definition
#router ospf 1
#auto-cost reference-bandwidth [bandwidth]
BW=10^8/iBW; iBW=interface Bandwidth |
|
|
Term
| Advertize a default route even if it doesn't exist in the RIB, Minimize the Database activity if the port is flapping |
|
Definition
#router ospf 1
#default-information originate always |
|
|
Term
| Changes the cost for a specific area. Used when more than 1 router is advertising 0.0.0.0; to break the tie. Default is 1 |
|
Definition
#router ospf 1
#default-information originate metric cost |
|
|
Term
| Changed the route type for external traffic entering a particular area. Type 1 includes the cost of external and ospf. Type 2 is only external cost. Default 2. |
|
Definition
#router ospf 1
#default-information originate metric-type type |
|
|
Term
| advertises a default route only if the conditions of the Route-map are met. "Always" command will break it. |
|
Definition
#router ospf 1
#default-information originate route-map name |
|
|
Term
| The command would change the default OSPF cost. Using the "redistribute cost" command would break it |
|
Definition
#router ospf 1
#default-metric cost
defaults: BGP=1; others=20 |
|
|
Term
It will delete the Null route created by summarizations. This is used when a similar route is installed and you want
preference to it, but the Null route is taking priority. Careful, loops may be created easily. |
|
Definition
#router ospf 1
#discard-route [internal, external] |
|
|
Term
| Changes the administrative-distance globally of OSPF |
|
Definition
#router ospf 1
#distance administrative-distance |
|
|
Term
| Changes the administrative-distance for a specific route, ACL specifies which routes from the neighbor |
|
Definition
#router ospf 1
#distance administrative-distance source-ip-address source-ip-mask |
|
|
Term
| Changes the administrative-distance for inter-area, intra-area or external |
|
Definition
#router ospf 1
#distance administrative-distance [ext, inter, intra] |
|
|
Term
Prevents OSPF Learned Routes from beign installed in the RIB, using a previous created ACL, prefix-list or route-map.
It may be applied to a specific interface and/or routing process.
Also may be used based on gateway. |
|
Definition
#router ospf 1
#distribute-list [ACL/prefix] [in/out]
#distribute-list [ACL/prefix] [in/out] int fa0/0 #distribute-list [ACL/prefix] out routing
#distribute-list Route-map [in/out] [int/rout] #distribute-list Gateway [in/out] [int/rout] |
|
|
Term
| Allows different OSPF process to belong to the same domain, routes will be seeing as IA instead of E2 |
|
Definition
#router ospf 1
#domain-id 1.1.1.1 [secondary] |
|
|
Term
| Manually sets the tag (used in MPLS networks) between the PE and CE. |
|
Definition
#router ospf 1
#domain-tag tag |
|
|
Term
| Ignores LSA 6, prevents the syslog message from beign generated. |
|
Definition
#router ospf 1
#ignore lsa mospf |
|
|
Term
| Once the SPF is calculated, this commands allows the SPF to calculate just a portion of the tree. |
|
Definition
|
|
Term
Changes the demand circuit and non-demand circuit retransmissions.
Default=24 |
|
Definition
#router ospf 1
#limit retransmissions [dc] 24 [non-dc] 24 |
|
|
Term
| Maximum number of non self-generated LSAs this process can receive. Used to protect the database. |
|
Definition
#router ospf 1
#max-lsa x [] |
|
|
Term
| Puts a maximum metric in OSPF after BGP recovers or a specified timer. |
|
Definition
#router ospf x
#max-metric router-lsa on-startup wait-for-bgp
#max-metric router-lsa on-startup <5-86400>
wait-for-bgp = 600s |
|
|
Term
| It changes the amount of routes that the router is allowed to have for 1 destination. |
|
Definition
#router ospf x
#maximum-paths <1-16>
Default 4 |
|
|
Term
| Configures a Neighbor over NBMA. Configures a unicast peer. |
|
Definition
#router ospf 1
#neighbor ip-address [cost] |
|
|
Term
Prevents LSA flooding to the indicated neighbor
Only on P2P or NBMA |
|
Definition
#router ospf 1
#neighbor ip-address database-filter all out |
|
|
Term
| Timer to send hellos after a dead timer. |
|
Definition
#router ospf 1
#neighbor ip-address poll-interval interval
Default 60 sec. |
|
|
Term
|
Definition
#router ospf 1
#neighbor ip-address priority priority |
|
|
Term
| Prevents packets to be sent to the specified interface. Default command, declares all interfaces. |
|
Definition
#router ospf 1
#passive-interface fa0/0 |
|
|
Term
| Number of incoming hello or update packets that the process can keep on its queue. |
|
Definition
#router ospf 1
#queue-depth [hello, update] [size, unlimited] |
|
|
Term
| Redistribution of the protocol inside OSPF Classfull |
|
Definition
#router ospf 1
#redistribute [protocol-AS] |
|
|
Term
| Redistribution of the protocol inside OSPF Classless |
|
Definition
#router ospf 1
#redistribute [protocol-AS] subnets |
|
|
Term
| Redistribution of the protocol inside OSPF as either E1 or E2 |
|
Definition
#router ospf 1
redistribute [protocol-AS] metric-type [E1,E2] |
|
|
Term
| Change the Metric of the redistributed protocol |
|
Definition
#router ospf 1
#redistribute [protocol-AS] metric |
|
|
Term
| Redistribution of the protocol inside OSPF Classfull referencing a Route-map |
|
Definition
#router ospf 1
#redistribute [protocol-AS] route-map name |
|
|
Term
| Summarizes LSA 5 into OSPF, can be done in ASBR and ABR. "not-advertise" suppresses the advertisement of default route |
|
Definition
#router ospf x
#summary-address ip-address mask not-advertise |
|
|
Term
| changes the default cost for that particular interface, not recommended |
|
Definition
#int fa0/0
#ip ospf cost cost |
|
|
Term
| Stops LSA flooding out the interface |
|
Definition
#int fa0/0
#ip ospf database-filter all out |
|
|
Term
| Changes the Dead interval |
|
Definition
#int fa0/0
#ip ospf dead-interval seconds |
|
|
Term
| Sends x (3-20) hellos in 1 sec. |
|
Definition
#int fa0/0
#ip ospf dead-interval minimal hello-multiplier x |
|
|
Term
| Stops Hellos and flooding, saving bandwidth. In a P2M, must be configured at the Multipoint. |
|
Definition
#int fa0/0
#ip ospf demand-circuit |
|
|
Term
| Sends the LSAs out the interface with the DoNotAge bit set, which disables the periodic LSA refresh (30 min) |
|
Definition
#int fa0/0
#ip ospf flood-reduction |
|
|
Term
| Changes the default interval (10s or 30s) to a value up to 8192s |
|
Definition
#int fa0/0
#ip ospf hello-interval seconds |
|
|
Term
| If there's an MTU missmatch, Routers will not form adjacency |
|
Definition
#int fa0/0
#ip ospf mtu-ignore |
|
|
Term
| Configures Broadcast network type |
|
Definition
#int fa0/0
#ip ospf network broadcast |
|
|
Term
| Eliminates Multicast from the OSPF advertisements. Neighbor command is required. |
|
Definition
#int fa0/0
#ip ospf network non-broadcast |
|
|
Term
| Configures point-to-multipoint network type |
|
Definition
#int fa0/0
#ip ospf network point-to-multipoint |
|
|
Term
| Configures an NBMA network as a multipoint network |
|
Definition
#int fa0/0
#ip ospf network point-to-multipoint non-broadcast |
|
|
Term
| Configures P2P OSPF Networks |
|
Definition
#int fa0/0
#ip ospf network point-to-point |
|
|
Term
| Configures the priority for the interface, default is 1, top 255. |
|
Definition
#int fa0/0
#ip ospf priority priority |
|
|
Term
| Retransmit time of the LSA to reenable the adjacency if lost. |
|
Definition
#int fa0/0
#ip ospf retransmit-interval seconds |
|
|
Term
| Time delay of propagating the LSA over the interface |
|
Definition
#int fa0/0
#ip ospf transmit-delay seconds |
|
|
Term
| How long the router will wait before taking a neighbor adjacency down. Default is same as dead timer. |
|
Definition
#int fa0/0
#ip ospf resync-timeout |
|
|
Term
| enable/disable Link-Local Signaling (LLS) on an interface, regardless of the router-level LLS setting |
|
Definition
#int fa0/0
#ip ospf lls [disable] |
|
|
Term
| Interconnects 2 non-adjacent areas, usually to attach a regular area to the backbone transiting another area. |
|
Definition
#router ospf 1
#area 1 virtual-link [peer_IP] |
|
|
Term
| Is a logical intra-area link to change the route type, allowing a vpn to be intra-area. |
|
Definition
#router ospf 1
#area 1 sham-link source_IP dest_IP cost cost |
|
|
