topic Re: how to create route-map in exos & apply to BGP peer-group in ExtremeSwitching (EXOS/Switch Engine)

how to create route-map in exos & apply to BGP peer-group

ddpatil89 — Sun, 02 Aug 2020 19:43:34 GMT

For the following cisco configuration i need exos configuration command lines. Please help.

route-map set-no-export permit 10
set community no-export

router bgp 24029
no synchronization
bgp log-neighbor-changes
neighbor IXP-peers peer-group
neighbor IXP-peers version 4
neighbor IXP-peers send-community
neighbor IXP-peers remove-private-as
neighbor IXP-peers soft-reconfiguration inbound
neighbor IXP-peers distribute-list 150 in
neighbor IXP-peers distribute-list 150 out
neighbor IXP-peers route-map set-no-export out
no auto-summary

Re: how to create route-map in exos & apply to BGP peer-group

Gabriel_G — Tue, 04 Aug 2020 22:46:21 GMT

Hi,

I’m not super familiar with iOS but this should be a rough translation with an example policy. Some other basic setup may not be included. Essentially, you create a policy file that permits or denies routes from being advertised and apply those to a neighbor or peer-group in the inbound or outbound direction. I think this has all the capabilities of route-maps and distribute lists but if not, you can also follow the User Guide (Routing Policies p.780, BGP p.1562) for a list of all match conditions, options, and examples. There is also the Command Reference that will tell you what each option does specifically and the default behavior.

route-map set-no-export permit 10 set community no-export //Create a Routing policy with vi //#vi <policy>.policy //i //entry et1 { //if match all {nlri 172.16.1.0/24;} //then {deny;} //} //ESC :wq

router bgp 24029 //#configure bgp AS-number <MyASN> //#create bgp neighbor <NEIGHBOR> remote-AS-number <NeighborASN> {multi-hop} //#enable bgp neighbor <NEIGHBOR>

no synchronization //EXOS does not redistribute routes with OSPF/RIP/ISIS by default (I think that is what this is about) bgp log-neighbor-changes //EXOS logs messages about BGP by default. '#show log' and '#show log events bgp [press TAB or ENTER]' neighbor IXP-peers peer-group //#[create | delete] bgp peer-group <PEER_GROUP> #configure bgp neighbor <NEIGHBOR> peer-group <PEER_GROUP> neighbor IXP-peers version 4 //EXOS is BGP v4 neighbor IXP-peers send-community //#configure bgp neighbor <NEIGHBOR> [send-community | dont-send-community] neighbor IXP-peers remove-private-as //#[enable | disable] bgp neighbor <NEIGHBOR> remove-private-AS-numbers neighbor IXP-peers soft-reconfiguration inbound //#configure bgp neighbor <NEIGHBOR> soft-reset in neighbor IXP-peers distribute-list 150 in neighbor IXP-peers distribute-list 150 out neighbor IXP-peers route-map set-no-export out //#configure bgp neighbor <NEIGHBOR> route-policy [in | out] <policy> no auto-summary //#[enable | disable] bgp aggregation

Kind Regards,

Gabriel

Re: how to create route-map in exos & apply to BGP peer-group

ddpatil89 — Wed, 05 Aug 2020 11:57:56 GMT

Thanks you for your prompt response. I have created the policy in exos to match with cisco policy. Can you please confirm is it correct or not?

Cisco policy --

route-map set-no-export permit 10
set community no-export

Converted to EXOS --

edit policy set-no-export
i
entry permit-anything-else {
if {
} then {
community set no-export;
permit;
}
}
Esc
:wq

Re: how to create route-map in exos & apply to BGP peer-group

Gabriel_G — Thu, 06 Aug 2020 00:37:49 GMT

Yep, I think that’s right.

You can also use the command ‘check policy <policy>’ to do syntax checking. When applied, the policy will set the no-export community attribute for all traffic.