Origin - Dell S4820T Configuration Manual

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Figure 26. Multi-Exit Discriminators

NOTE: Configuring the set metric-type internal command in a route-map advertises the

IGP cost as MED to outbound EBGP peers when redistributing routes. The configured set metric

value overwrites the default IGP cost. If the outbound route-map uses MED, it overwrites IGP MED.

Origin

The origin indicates the origin of the prefix, or how the prefix came into BGP. There are three origin

codes: IGP, EGP, INCOMPLETE.

Indicates the prefix originated from information learned through an interior

gateway protocol.

Indicates the prefix originated from information learned from an EGP protocol,

which NGP replaced.

Indicates that the prefix originated from an unknown source.

Generally, an IGP indicator means that the route was derived inside the originating AS. EGP generally

means that a route was learned from an external gateway protocol. An INCOMPLETE origin code

generally results from aggregation, redistribution, or other indirect ways of installing routes into BGP.

In Dell Networking OS, these origin codes appear as shown in the following example. The question mark

(?) indicates an origin code of INCOMPLETE (shown in bold). The lower case letter (i) indicates an origin

code of IGP (shown in bold).

Example of Viewing Origin Codes

Dell#show ip bgp

BGP table version is 0, local router ID is 10.101.15.13

Status codes: s suppressed, d damped, h history, * valid, > best

Path source: I - internal, a - aggregate, c - confed-external, r -

redistributed, n - network

Origin codes: i - IGP, e - EGP, ? - incomplete

*> 7.0.0.0/29

Border Gateway Protocol IPv4 (BGPv4)