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Multi Exit Discriminator (MED) Policy
MEDs received from peers will be ignored by default, unless prior arrangements have been made to confirm the quality of the values.
MEDs are announced by default, using good aggregates and meaningful values based on IGP costs. Peers may decide to honor these MEDs at their discretion.
Damping Policy
Routing flaps from eBGP peers may be progressively dampened, based on prefix lengths as describe in the table below. This is done to protect our network from the instabilities of other announcements on the Internet.
Prefix Length Filtering
Announcements received from peers are filtered against a list of bogon blocks, as well as by prefix length. The shortest prefix length which will be accepted from any network is a /5, the longest prefix length which will be accepted is a /24.
Outbound announcements from nLayer will never exceed /24 in length. All routes announced will be registered in the Internet Routing Registry (IRR) databases under the as-set AS-NLAYER.
| Damping Policy |
| Prefix Length |
Half-life |
Reuse Limit |
Suppress Limit |
Max Suppress |
| /24 or longer |
10 |
7000 |
10000 |
15 |
| /20 - /23 |
5 |
7000 |
10000 |
10 |
| /17 - /19 |
3 |
7000 |
10000 |
5 |
| /16 or shorter |
1 |
10000 |
15000 |
2 |
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