Date: Tue, 19 Mar 2024 02:54:44 +0000 (UTC) Message-ID: <602639141.819.1710816884630@wiki.mef.net> Subject: Exported From Confluence MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_Part_818_1715967918.1710816884628" ------=_Part_818_1715967918.1710816884628 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Content-Location: file:///C:/exported.html
An E-Transit is an OVC-based Carrier Ethernet servi= ce in which all OVC End Points are at ENNIs.
E-Transit includes:
An E-Line, E-LAN, or E-Tree service may require ac= cess to remote UNIs through an intermediate Carrier Ethernet Network (CEN) = that does not contain any of the UNIs in the EVC. If the OVC in the interme= diate CEN only requires two end points, a Transit E-Line service can be pur= chased from an Operator. Figure = 1 at right shows two Transit E-Lines within a CEN, each connecting two OVC End Points at two = ENNIs. These OVCs are used by the Service Provider&nbs= p;to create two EPL services.
An E-Line, E-LAN, or E-Tree service may require ac= cess to remote UNIs through an intermediate Carrier Ethernet Network (CEN) = that does not contain any of the UNIs in the EVC. If the OVC in the interme= diate CEN requires two1 or more OVC endpoints a Transit E-LAN se= rvice can be purchased from an Opera= tor. Figure 2 at right shows a Transit E-LAN service within a CEN provi= ding connectivity for an EVP-LAN service associating UNIs in three CENs.
In Figure 3 at right, both remote UNIs are in the = E-LAN service are in CEN C. CEN C can only provide point-to-point services = to access the UNIs (Access E-Line services), so a Transit E-LAN service wit= h hairpin switching is used in CEN A.
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