Jaycee's Networking

October 20, 2009

JUNOS Default Policies

Filed under: Junos — Tags: — Jaycee @ 7:51 pm

LS protocol (Link-State protocol): OSPF and ISIS

1. LS default policy:

a. default import policy:

1) accept all routes learned through LS protocol

2) for OSPF, filter external routes from being installed into the route table.

b. default export policy:

1) reject everything

2) for OSPF, LSA flooding is not affected by export policy. The advertisement of local interfaces are enabled to run OSPF, the readvertisement (flooding) of LSAs received fro other routers.

2. RIP default policy:

a. default import policy: accept all received RIP routes that pass a sanity check

b. default export policy: advertise no routes

*You’ll need to create and apply a custom export policy to readvertise RIP learned and direct routes for interfaces running RIP to other RIP speakers.

3. BGP default policy:

a. default import policy: accept all received BGP routes that pass a sanity check

b. default export policy: readvertise all learned BGP routes to all BGP speakers

Advertisements

Leave a Comment »

No comments yet.

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Create a free website or blog at WordPress.com.

%d bloggers like this: