On Thu, Jul 26, 2012 at 12:26 PM, Luiz Ozaki <luiz.oz...@locaweb.com.br>wrote:
> On 7/26/12 4:01 PM, Jesse Gross wrote: > > OVS can match on all protocol fields in an ARP packet: > Ethernet source MAC: dl_src > Ethernet dest MAC: dl_dst > ARP source protocol address: nw_src > ARP source hardware address: arp_sha > ARP target protocol address: nw_dst > ARP target hardware address: arp_tha > > > As in the manpage too: > > nw_src turns into arp_sha and nw_dst into arp_tha if it's arp, right ? > > No, nw_src is an IP address while arp_sha is a MAC address. > *nw_src=**ip*[*/**netmask*] > > *nw_dst=**ip*[*/**netmask*] > > When *dl_type* is 0x0800 (possibly via shorthand, e.g. *ip* or *tcp*), > matches IPv4 source (or destination) address *ip*, which may be specified > as an IP address or host name (e.g. *192.168.1.1* or *www.example.com*). > The optional *netmask* allows restricting a match to an IPv4 address > prefix. The netmask may be specified as a dotted quad (e.g. * > 192.168.1.0/255.255.255.0*) or as a CIDR block (e.g. *192.168.1.0/24*). > Open vSwitch 1.8 and later support arbitrary dotted quad masks; earlier > versions support only CIDR masks, that is, the dotted quads that are > equivalent to some CIDR block. > > *When **dl_type=0x0806 or **arp is specified, matches the **ar_spa or ** > ar_tpa field, respectively, in ARP packets for IPv4 and Ethernet.* > > Actually there are some typo errors in there, no ? *ar_spa *and* ar_tpa*? Is > that right ? > > Shouldn't be arp_spa and arp_tpa ? Or arp_sha and arp_tha ? > ar_spa and ar_tpa are common abbreviations for the IP addresses in an ARP payload.
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