Re: L3 DSR
Joo Yong-Seok <[email protected]>
| Newsgroups | gmane.comp.programming.load-balancing.general |
|---|---|
| Message-ID | <[email protected]> |
There is TYPO. SIP ---> SMAC. Best regards, - yongseok On Mon, Mar 30, 2009 at 10:25 AM, Joo Yong-Seok <[email protected]>wrote: > I suppsoe that L2 or L3 config doesn't matter. the important thing in DSR > is "returning packet" should > not be forwarded to L4 and L4 should not do any processing for that. > > Clients > | > | 192.168.10.0/24, VIP : 192.168.10.100 > | > L3-SW ==== L4 SW > | > | > | 10.10.10.0/24 > Servers > > In this topoloty, L4 can have two interfaces for 192.168.10.0/24 and > 10.10.10.0/24. In Servers point of > view, GW should be L3-SW. Client requests will be forwarded to L3 but L3 > knows the VIP location (L4) > and it will forward the request via L2-fwd. > > L4 will do a client processing and send the packet to Servers. In this > moment, DSR should be enabled > and request packet's DIP is not modified. and Server will received the > packet and then forward it to L3-SW > since L3-SW is a gateway for servers. > > I suppose that this is L3 DSR and return packet will not traverse to L4. > > Also, L4-SW is in the same network with servers, health check by using > real-mac (VIPhealth) is also > working and No mac flapping. (Since L4 is doing L3 fwd + L4 processing and > packet's SIP should be > modified. L3-SW will not have any duplicate mac-address entry in the fdb. - > Even there are same mac > in fdb, if VLAN is different, there should be no issues to do a L2-fwd). > > I have no idea why L2 broadcast issue is there on DSR. (do you mean > "mac-flapping"? - this can cause > flooding in the network). > > Best regards, > > - yongseok > > 2009/3/30 SungLyeol Choi <[email protected]> > >> Hi guys. >> Have you heard about L3 DSR? >> which vendors support this? >> I heard L3 DSR could protect L2 broadcast. but I think LB should consider >> a lot of things to support that. >> >> Thanks. >> >> _______________________________________________ >> lb-l mailing list >> [email protected] >> http://vegan.net/mailman/listinfo/lb-l >> Searchable Archive: http://vegan.net/lb/archive >> http://lbdigest.com Load Balancing Digest >> http://lbwiki.com Load Balancing Wiki >> >> > _______________________________________________ lb-l mailing list [email protected] http://vegan.net/mailman/listinfo/lb-l Searchable Archive: http://vegan.net/lb/archive http://lbdigest.com Load Balancing Digest http://lbwiki.com Load Balancing Wiki