> > HDLC is a Cisco-proprietary protocol. > >Not to nitpick, but HDLC itself is not proprietary; Cisco's >implementation is... HDLC was developed by the International >Organization for Standardization (ISO). It falls under the ISO >standards ISO 3309 and ISO 4335. > >Like others have pointed out, PPP is the way to go when mixing >vendors, since it is an Internet standard. > >There may be one exception, however, but I cannot confirm it 100%... >I was out at one of my customers a few weeks ago, and they were >changing ISPs. I asked the new ISP whether we ought to be using PPP >or HDLC, and he said HDLC. I commented on their use of Cisco >equipment, and he told me that the head-end router was actually a >Juniper box. > >Now, it seems reasonable to me that the new kid on the block, so to >speak, would attempt to seemlessly interoperate with the most widely >used routers, but I cannot say for sure. Can anyone confirm this?
It would be most correct to say Cisco uses an HDLC-framed proprietary protocol. HDLC itself is really meant to be subsetted. LAP, LAP-B, LAP-D, and LAP-F are all proper subsets. Juniper may have Cisco HDLC as an option. I know BSDI UNIX does. But HDLC has no real advantages over PPP for router-to-router communications, so it's not something I worry about -- if there's any question, I use PPP. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27637&t=27637 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
